ccbb28167b
git-svn-id: https://phpexcel.svn.codeplex.com/svn/trunk@66338 2327b42d-5241-43d6-9e2a-de5ac946f064
1819 lines
69 KiB
PHP
1819 lines
69 KiB
PHP
<?php
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/**
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* PHPExcel
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*
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* Copyright (c) 2006 - 2011 PHPExcel
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* @category PHPExcel
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* @package PHPExcel_Calculation
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* @copyright Copyright (c) 2006 - 2011 PHPExcel (http://www.codeplex.com/PHPExcel)
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* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
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* @version ##VERSION##, ##DATE##
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*/
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/** PHPExcel root directory */
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if (!defined('PHPEXCEL_ROOT')) {
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/**
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* @ignore
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*/
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define('PHPEXCEL_ROOT', dirname(__FILE__) . '/../../');
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require(PHPEXCEL_ROOT . 'PHPExcel/Autoloader.php');
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}
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/** FINANCIAL_MAX_ITERATIONS */
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define('FINANCIAL_MAX_ITERATIONS', 128);
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/** FINANCIAL_PRECISION */
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define('FINANCIAL_PRECISION', 1.0e-08);
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/**
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* PHPExcel_Calculation_Financial
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*
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* @category PHPExcel
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* @package PHPExcel_Calculation
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* @copyright Copyright (c) 2006 - 2011 PHPExcel (http://www.codeplex.com/PHPExcel)
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*/
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class PHPExcel_Calculation_Financial {
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private static function _lastDayOfMonth($testDate) {
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$date = clone $testDate;
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$date->modify('+1 day');
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return ($date->format('d') == 1);
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} // function _lastDayOfMonth()
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private static function _firstDayOfMonth($testDate) {
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$date = clone $testDate;
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return ($date->format('d') == 1);
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} // function _lastDayOfMonth()
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private static function _coupFirstPeriodDate($settlement, $maturity, $frequency, $next) {
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$months = 12 / $frequency;
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$result = PHPExcel_Shared_Date::ExcelToPHPObject($maturity);
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$eom = self::_lastDayOfMonth($result);
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while ($settlement < PHPExcel_Shared_Date::PHPToExcel($result)) {
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$result->modify('-'.$months.' months');
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}
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if ($next) {
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$result->modify('+'.$months.' months');
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}
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if ($eom) {
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$result->modify('-1 day');
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}
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return PHPExcel_Shared_Date::PHPToExcel($result);
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} // function _coupFirstPeriodDate()
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private static function _validFrequency($frequency) {
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if (($frequency == 1) || ($frequency == 2) || ($frequency == 4)) {
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return true;
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}
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if ((PHPExcel_Calculation_Functions::getCompatibilityMode() == PHPExcel_Calculation_Functions::COMPATIBILITY_GNUMERIC) &&
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(($frequency == 6) || ($frequency == 12))) {
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return true;
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}
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return false;
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} // function _validFrequency()
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private static function _daysPerYear($year,$basis) {
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switch ($basis) {
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case 0 :
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case 2 :
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case 4 :
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$daysPerYear = 360;
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break;
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case 3 :
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$daysPerYear = 365;
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break;
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case 1 :
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if (PHPExcel_Calculation_DateTime::_isLeapYear($year)) {
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$daysPerYear = 366;
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} else {
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$daysPerYear = 365;
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}
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break;
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default :
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return PHPExcel_Calculation_Functions::NaN();
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}
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return $daysPerYear;
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} // function _daysPerYear()
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private static function _interestAndPrincipal($rate=0, $per=0, $nper=0, $pv=0, $fv=0, $type=0) {
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$pmt = self::PMT($rate, $nper, $pv, $fv, $type);
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$capital = $pv;
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for ($i = 1; $i<= $per; ++$i) {
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$interest = ($type && $i == 1) ? 0 : -$capital * $rate;
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$principal = $pmt - $interest;
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$capital += $principal;
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}
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return array($interest, $principal);
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} // function _interestAndPrincipal()
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/**
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* ACCRINT
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*
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* Returns the discount rate for a security.
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*
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* @param mixed issue The security's issue date.
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* @param mixed firstinter The security's first interest date.
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* @param mixed settlement The security's settlement date.
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* @param float rate The security's annual coupon rate.
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* @param float par The security's par value.
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* @param int basis The type of day count to use.
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* 0 or omitted US (NASD) 30/360
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* 1 Actual/actual
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* 2 Actual/360
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* 3 Actual/365
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* 4 European 30/360
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* @return float
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*/
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public static function ACCRINT($issue, $firstinter, $settlement, $rate, $par=1000, $frequency=1, $basis=0) {
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$issue = PHPExcel_Calculation_Functions::flattenSingleValue($issue);
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$firstinter = PHPExcel_Calculation_Functions::flattenSingleValue($firstinter);
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$settlement = PHPExcel_Calculation_Functions::flattenSingleValue($settlement);
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$rate = (float) PHPExcel_Calculation_Functions::flattenSingleValue($rate);
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$par = (is_null($par)) ? 1000 : (float) PHPExcel_Calculation_Functions::flattenSingleValue($par);
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$frequency = (is_null($frequency)) ? 1 : (int) PHPExcel_Calculation_Functions::flattenSingleValue($frequency);
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$basis = (is_null($basis)) ? 0 : (int) PHPExcel_Calculation_Functions::flattenSingleValue($basis);
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// Validate
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if ((is_numeric($rate)) && (is_numeric($par))) {
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if (($rate <= 0) || ($par <= 0)) {
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return PHPExcel_Calculation_Functions::NaN();
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}
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$daysBetweenIssueAndSettlement = PHPExcel_Calculation_DateTime::YEARFRAC($issue, $settlement, $basis);
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if (!is_numeric($daysBetweenIssueAndSettlement)) {
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// return date error
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return $daysBetweenIssueAndSettlement;
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}
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return $par * $rate * $daysBetweenIssueAndSettlement;
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}
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return PHPExcel_Calculation_Functions::VALUE();
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} // function ACCRINT()
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/**
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* ACCRINTM
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*
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* Returns the discount rate for a security.
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*
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* @param mixed issue The security's issue date.
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* @param mixed settlement The security's settlement date.
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* @param float rate The security's annual coupon rate.
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* @param float par The security's par value.
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* @param int basis The type of day count to use.
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* 0 or omitted US (NASD) 30/360
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* 1 Actual/actual
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* 2 Actual/360
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* 3 Actual/365
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* 4 European 30/360
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* @return float
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*/
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public static function ACCRINTM($issue, $settlement, $rate, $par=1000, $basis=0) {
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$issue = PHPExcel_Calculation_Functions::flattenSingleValue($issue);
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$settlement = PHPExcel_Calculation_Functions::flattenSingleValue($settlement);
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$rate = (float) PHPExcel_Calculation_Functions::flattenSingleValue($rate);
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$par = (is_null($par)) ? 1000 : (float) PHPExcel_Calculation_Functions::flattenSingleValue($par);
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$basis = (is_null($basis)) ? 0 : (int) PHPExcel_Calculation_Functions::flattenSingleValue($basis);
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// Validate
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if ((is_numeric($rate)) && (is_numeric($par))) {
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if (($rate <= 0) || ($par <= 0)) {
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return PHPExcel_Calculation_Functions::NaN();
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}
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$daysBetweenIssueAndSettlement = PHPExcel_Calculation_DateTime::YEARFRAC($issue, $settlement, $basis);
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if (!is_numeric($daysBetweenIssueAndSettlement)) {
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// return date error
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return $daysBetweenIssueAndSettlement;
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}
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return $par * $rate * $daysBetweenIssueAndSettlement;
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}
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return PHPExcel_Calculation_Functions::VALUE();
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} // function ACCRINTM()
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public static function AMORDEGRC($cost, $purchased, $firstPeriod, $salvage, $period, $rate, $basis=0) {
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$cost = PHPExcel_Calculation_Functions::flattenSingleValue($cost);
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$purchased = PHPExcel_Calculation_Functions::flattenSingleValue($purchased);
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$firstPeriod = PHPExcel_Calculation_Functions::flattenSingleValue($firstPeriod);
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$salvage = PHPExcel_Calculation_Functions::flattenSingleValue($salvage);
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$period = floor(PHPExcel_Calculation_Functions::flattenSingleValue($period));
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$rate = PHPExcel_Calculation_Functions::flattenSingleValue($rate);
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$basis = (is_null($basis)) ? 0 : (int) PHPExcel_Calculation_Functions::flattenSingleValue($basis);
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$fUsePer = 1.0 / $rate;
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if ($fUsePer < 3.0) {
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$amortiseCoeff = 1.0;
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} elseif ($fUsePer < 5.0) {
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$amortiseCoeff = 1.5;
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} elseif ($fUsePer <= 6.0) {
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$amortiseCoeff = 2.0;
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} else {
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$amortiseCoeff = 2.5;
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}
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$rate *= $amortiseCoeff;
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$fNRate = round(PHPExcel_Calculation_DateTime::YEARFRAC($purchased, $firstPeriod, $basis) * $rate * $cost,0);
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$cost -= $fNRate;
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$fRest = $cost - $salvage;
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for ($n = 0; $n < $period; ++$n) {
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$fNRate = round($rate * $cost,0);
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$fRest -= $fNRate;
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if ($fRest < 0.0) {
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switch ($period - $n) {
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case 0 :
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case 1 : return round($cost * 0.5,0);
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break;
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default : return 0.0;
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break;
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}
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}
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$cost -= $fNRate;
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}
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return $fNRate;
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} // function AMORDEGRC()
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public static function AMORLINC($cost, $purchased, $firstPeriod, $salvage, $period, $rate, $basis=0) {
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$cost = PHPExcel_Calculation_Functions::flattenSingleValue($cost);
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$purchased = PHPExcel_Calculation_Functions::flattenSingleValue($purchased);
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$firstPeriod = PHPExcel_Calculation_Functions::flattenSingleValue($firstPeriod);
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$salvage = PHPExcel_Calculation_Functions::flattenSingleValue($salvage);
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$period = PHPExcel_Calculation_Functions::flattenSingleValue($period);
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$rate = PHPExcel_Calculation_Functions::flattenSingleValue($rate);
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$basis = (is_null($basis)) ? 0 : (int) PHPExcel_Calculation_Functions::flattenSingleValue($basis);
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$fOneRate = $cost * $rate;
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$fCostDelta = $cost - $salvage;
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// Note, quirky variation for leap years on the YEARFRAC for this function
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$purchasedYear = PHPExcel_Calculation_DateTime::YEAR($purchased);
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$yearFrac = PHPExcel_Calculation_DateTime::YEARFRAC($purchased, $firstPeriod, $basis);
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if (($basis == 1) && ($yearFrac < 1) && (PHPExcel_Calculation_DateTime::_isLeapYear($purchasedYear))) {
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$yearFrac *= 365 / 366;
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}
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$f0Rate = $yearFrac * $rate * $cost;
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$nNumOfFullPeriods = intval(($cost - $salvage - $f0Rate) / $fOneRate);
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if ($period == 0) {
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return $f0Rate;
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} elseif ($period <= $nNumOfFullPeriods) {
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return $fOneRate;
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} elseif ($period == ($nNumOfFullPeriods + 1)) {
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return ($fCostDelta - $fOneRate * $nNumOfFullPeriods - $f0Rate);
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} else {
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return 0.0;
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}
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} // function AMORLINC()
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public static function COUPDAYBS($settlement, $maturity, $frequency, $basis=0) {
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$settlement = PHPExcel_Calculation_Functions::flattenSingleValue($settlement);
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$maturity = PHPExcel_Calculation_Functions::flattenSingleValue($maturity);
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$frequency = (int) PHPExcel_Calculation_Functions::flattenSingleValue($frequency);
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$basis = (is_null($basis)) ? 0 : (int) PHPExcel_Calculation_Functions::flattenSingleValue($basis);
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if (is_string($settlement = PHPExcel_Calculation_DateTime::_getDateValue($settlement))) {
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return PHPExcel_Calculation_Functions::VALUE();
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}
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if (is_string($maturity = PHPExcel_Calculation_DateTime::_getDateValue($maturity))) {
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return PHPExcel_Calculation_Functions::VALUE();
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}
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if (($settlement > $maturity) ||
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(!self::_validFrequency($frequency)) ||
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(($basis < 0) || ($basis > 4))) {
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return PHPExcel_Calculation_Functions::NaN();
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}
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$daysPerYear = self::_daysPerYear(PHPExcel_Calculation_DateTime::YEAR($settlement),$basis);
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$prev = self::_coupFirstPeriodDate($settlement, $maturity, $frequency, False);
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return PHPExcel_Calculation_DateTime::YEARFRAC($prev, $settlement, $basis) * $daysPerYear;
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} // function COUPDAYBS()
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public static function COUPDAYS($settlement, $maturity, $frequency, $basis=0) {
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$settlement = PHPExcel_Calculation_Functions::flattenSingleValue($settlement);
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$maturity = PHPExcel_Calculation_Functions::flattenSingleValue($maturity);
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$frequency = (int) PHPExcel_Calculation_Functions::flattenSingleValue($frequency);
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$basis = (is_null($basis)) ? 0 : (int) PHPExcel_Calculation_Functions::flattenSingleValue($basis);
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if (is_string($settlement = PHPExcel_Calculation_DateTime::_getDateValue($settlement))) {
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return PHPExcel_Calculation_Functions::VALUE();
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}
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if (is_string($maturity = PHPExcel_Calculation_DateTime::_getDateValue($maturity))) {
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return PHPExcel_Calculation_Functions::VALUE();
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}
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if (($settlement > $maturity) ||
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(!self::_validFrequency($frequency)) ||
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(($basis < 0) || ($basis > 4))) {
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return PHPExcel_Calculation_Functions::NaN();
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}
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switch ($basis) {
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case 3: // Actual/365
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return 365 / $frequency;
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case 1: // Actual/actual
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if ($frequency == 1) {
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$daysPerYear = self::_daysPerYear(PHPExcel_Calculation_DateTime::YEAR($maturity),$basis);
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return ($daysPerYear / $frequency);
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} else {
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$prev = self::_coupFirstPeriodDate($settlement, $maturity, $frequency, False);
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$next = self::_coupFirstPeriodDate($settlement, $maturity, $frequency, True);
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return ($next - $prev);
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}
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default: // US (NASD) 30/360, Actual/360 or European 30/360
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return 360 / $frequency;
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}
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return PHPExcel_Calculation_Functions::VALUE();
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} // function COUPDAYS()
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public static function COUPDAYSNC($settlement, $maturity, $frequency, $basis=0) {
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$settlement = PHPExcel_Calculation_Functions::flattenSingleValue($settlement);
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$maturity = PHPExcel_Calculation_Functions::flattenSingleValue($maturity);
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$frequency = (int) PHPExcel_Calculation_Functions::flattenSingleValue($frequency);
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$basis = (is_null($basis)) ? 0 : (int) PHPExcel_Calculation_Functions::flattenSingleValue($basis);
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if (is_string($settlement = PHPExcel_Calculation_DateTime::_getDateValue($settlement))) {
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return PHPExcel_Calculation_Functions::VALUE();
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}
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if (is_string($maturity = PHPExcel_Calculation_DateTime::_getDateValue($maturity))) {
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return PHPExcel_Calculation_Functions::VALUE();
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}
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if (($settlement > $maturity) ||
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(!self::_validFrequency($frequency)) ||
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(($basis < 0) || ($basis > 4))) {
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return PHPExcel_Calculation_Functions::NaN();
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}
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$daysPerYear = self::_daysPerYear(PHPExcel_Calculation_DateTime::YEAR($settlement),$basis);
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$next = self::_coupFirstPeriodDate($settlement, $maturity, $frequency, True);
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return PHPExcel_Calculation_DateTime::YEARFRAC($settlement, $next, $basis) * $daysPerYear;
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} // function COUPDAYSNC()
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public static function COUPNCD($settlement, $maturity, $frequency, $basis=0) {
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$settlement = PHPExcel_Calculation_Functions::flattenSingleValue($settlement);
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$maturity = PHPExcel_Calculation_Functions::flattenSingleValue($maturity);
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$frequency = (int) PHPExcel_Calculation_Functions::flattenSingleValue($frequency);
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$basis = (is_null($basis)) ? 0 : (int) PHPExcel_Calculation_Functions::flattenSingleValue($basis);
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if (is_string($settlement = PHPExcel_Calculation_DateTime::_getDateValue($settlement))) {
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return PHPExcel_Calculation_Functions::VALUE();
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}
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if (is_string($maturity = PHPExcel_Calculation_DateTime::_getDateValue($maturity))) {
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return PHPExcel_Calculation_Functions::VALUE();
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}
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if (($settlement > $maturity) ||
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(!self::_validFrequency($frequency)) ||
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(($basis < 0) || ($basis > 4))) {
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return PHPExcel_Calculation_Functions::NaN();
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}
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return self::_coupFirstPeriodDate($settlement, $maturity, $frequency, True);
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} // function COUPNCD()
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public static function COUPNUM($settlement, $maturity, $frequency, $basis=0) {
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$settlement = PHPExcel_Calculation_Functions::flattenSingleValue($settlement);
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$maturity = PHPExcel_Calculation_Functions::flattenSingleValue($maturity);
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$frequency = (int) PHPExcel_Calculation_Functions::flattenSingleValue($frequency);
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$basis = (is_null($basis)) ? 0 : (int) PHPExcel_Calculation_Functions::flattenSingleValue($basis);
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if (is_string($settlement = PHPExcel_Calculation_DateTime::_getDateValue($settlement))) {
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return PHPExcel_Calculation_Functions::VALUE();
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}
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if (is_string($maturity = PHPExcel_Calculation_DateTime::_getDateValue($maturity))) {
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return PHPExcel_Calculation_Functions::VALUE();
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}
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if (($settlement > $maturity) ||
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(!self::_validFrequency($frequency)) ||
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(($basis < 0) || ($basis > 4))) {
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return PHPExcel_Calculation_Functions::NaN();
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}
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$settlement = self::_coupFirstPeriodDate($settlement, $maturity, $frequency, True);
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$daysBetweenSettlementAndMaturity = PHPExcel_Calculation_DateTime::YEARFRAC($settlement, $maturity, $basis) * 365;
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switch ($frequency) {
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case 1: // annual payments
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return ceil($daysBetweenSettlementAndMaturity / 360);
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case 2: // half-yearly
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return ceil($daysBetweenSettlementAndMaturity / 180);
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case 4: // quarterly
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return ceil($daysBetweenSettlementAndMaturity / 90);
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case 6: // bimonthly
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return ceil($daysBetweenSettlementAndMaturity / 60);
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case 12: // monthly
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return ceil($daysBetweenSettlementAndMaturity / 30);
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}
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return PHPExcel_Calculation_Functions::VALUE();
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} // function COUPNUM()
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public static function COUPPCD($settlement, $maturity, $frequency, $basis=0) {
|
|
$settlement = PHPExcel_Calculation_Functions::flattenSingleValue($settlement);
|
|
$maturity = PHPExcel_Calculation_Functions::flattenSingleValue($maturity);
|
|
$frequency = (int) PHPExcel_Calculation_Functions::flattenSingleValue($frequency);
|
|
$basis = (is_null($basis)) ? 0 : (int) PHPExcel_Calculation_Functions::flattenSingleValue($basis);
|
|
|
|
if (is_string($settlement = PHPExcel_Calculation_DateTime::_getDateValue($settlement))) {
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
|
}
|
|
if (is_string($maturity = PHPExcel_Calculation_DateTime::_getDateValue($maturity))) {
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
|
}
|
|
|
|
if (($settlement > $maturity) ||
|
|
(!self::_validFrequency($frequency)) ||
|
|
(($basis < 0) || ($basis > 4))) {
|
|
return PHPExcel_Calculation_Functions::NaN();
|
|
}
|
|
|
|
return self::_coupFirstPeriodDate($settlement, $maturity, $frequency, False);
|
|
} // function COUPPCD()
|
|
|
|
|
|
/**
|
|
* CUMIPMT
|
|
*
|
|
* Returns the cumulative interest paid on a loan between start_period and end_period.
|
|
*
|
|
* @param float $rate Interest rate per period
|
|
* @param int $nper Number of periods
|
|
* @param float $pv Present Value
|
|
* @param int start The first period in the calculation.
|
|
* Payment periods are numbered beginning with 1.
|
|
* @param int end The last period in the calculation.
|
|
* @param int $type Payment type: 0 = at the end of each period, 1 = at the beginning of each period
|
|
* @return float
|
|
*/
|
|
public static function CUMIPMT($rate, $nper, $pv, $start, $end, $type = 0) {
|
|
$rate = PHPExcel_Calculation_Functions::flattenSingleValue($rate);
|
|
$nper = (int) PHPExcel_Calculation_Functions::flattenSingleValue($nper);
|
|
$pv = PHPExcel_Calculation_Functions::flattenSingleValue($pv);
|
|
$start = (int) PHPExcel_Calculation_Functions::flattenSingleValue($start);
|
|
$end = (int) PHPExcel_Calculation_Functions::flattenSingleValue($end);
|
|
$type = (int) PHPExcel_Calculation_Functions::flattenSingleValue($type);
|
|
|
|
// Validate parameters
|
|
if ($type != 0 && $type != 1) {
|
|
return PHPExcel_Calculation_Functions::NaN();
|
|
}
|
|
if ($start < 1 || $start > $end) {
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
|
}
|
|
|
|
// Calculate
|
|
$interest = 0;
|
|
for ($per = $start; $per <= $end; ++$per) {
|
|
$interest += self::IPMT($rate, $per, $nper, $pv, 0, $type);
|
|
}
|
|
|
|
return $interest;
|
|
} // function CUMIPMT()
|
|
|
|
|
|
/**
|
|
* CUMPRINC
|
|
*
|
|
* Returns the cumulative principal paid on a loan between start_period and end_period.
|
|
*
|
|
* @param float $rate Interest rate per period
|
|
* @param int $nper Number of periods
|
|
* @param float $pv Present Value
|
|
* @param int start The first period in the calculation.
|
|
* Payment periods are numbered beginning with 1.
|
|
* @param int end The last period in the calculation.
|
|
* @param int $type Payment type: 0 = at the end of each period, 1 = at the beginning of each period
|
|
* @return float
|
|
*/
|
|
public static function CUMPRINC($rate, $nper, $pv, $start, $end, $type = 0) {
|
|
$rate = PHPExcel_Calculation_Functions::flattenSingleValue($rate);
|
|
$nper = (int) PHPExcel_Calculation_Functions::flattenSingleValue($nper);
|
|
$pv = PHPExcel_Calculation_Functions::flattenSingleValue($pv);
|
|
$start = (int) PHPExcel_Calculation_Functions::flattenSingleValue($start);
|
|
$end = (int) PHPExcel_Calculation_Functions::flattenSingleValue($end);
|
|
$type = (int) PHPExcel_Calculation_Functions::flattenSingleValue($type);
|
|
|
|
// Validate parameters
|
|
if ($type != 0 && $type != 1) {
|
|
return PHPExcel_Calculation_Functions::NaN();
|
|
}
|
|
if ($start < 1 || $start > $end) {
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
|
}
|
|
|
|
// Calculate
|
|
$principal = 0;
|
|
for ($per = $start; $per <= $end; ++$per) {
|
|
$principal += self::PPMT($rate, $per, $nper, $pv, 0, $type);
|
|
}
|
|
|
|
return $principal;
|
|
} // function CUMPRINC()
|
|
|
|
|
|
/**
|
|
* DB
|
|
*
|
|
* Returns the depreciation of an asset for a specified period using the fixed-declining balance method.
|
|
* This form of depreciation is used if you want to get a higher depreciation value at the beginning of the depreciation
|
|
* (as opposed to linear depreciation). The depreciation value is reduced with every depreciation period by the
|
|
* depreciation already deducted from the initial cost.
|
|
*
|
|
* @param float cost Initial cost of the asset.
|
|
* @param float salvage Value at the end of the depreciation. (Sometimes called the salvage value of the asset)
|
|
* @param int life Number of periods over which the asset is depreciated. (Sometimes called the useful life of the asset)
|
|
* @param int period The period for which you want to calculate the depreciation. Period must use the same units as life.
|
|
* @param float month Number of months in the first year. If month is omitted, it defaults to 12.
|
|
* @return float
|
|
*/
|
|
public static function DB($cost, $salvage, $life, $period, $month=12) {
|
|
$cost = (float) PHPExcel_Calculation_Functions::flattenSingleValue($cost);
|
|
$salvage = (float) PHPExcel_Calculation_Functions::flattenSingleValue($salvage);
|
|
$life = (int) PHPExcel_Calculation_Functions::flattenSingleValue($life);
|
|
$period = (int) PHPExcel_Calculation_Functions::flattenSingleValue($period);
|
|
$month = (int) PHPExcel_Calculation_Functions::flattenSingleValue($month);
|
|
|
|
// Validate
|
|
if ((is_numeric($cost)) && (is_numeric($salvage)) && (is_numeric($life)) && (is_numeric($period)) && (is_numeric($month))) {
|
|
if ($cost == 0) {
|
|
return 0.0;
|
|
} elseif (($cost < 0) || (($salvage / $cost) < 0) || ($life <= 0) || ($period < 1) || ($month < 1)) {
|
|
return PHPExcel_Calculation_Functions::NaN();
|
|
}
|
|
// Set Fixed Depreciation Rate
|
|
$fixedDepreciationRate = 1 - pow(($salvage / $cost), (1 / $life));
|
|
$fixedDepreciationRate = round($fixedDepreciationRate, 3);
|
|
|
|
// Loop through each period calculating the depreciation
|
|
$previousDepreciation = 0;
|
|
for ($per = 1; $per <= $period; ++$per) {
|
|
if ($per == 1) {
|
|
$depreciation = $cost * $fixedDepreciationRate * $month / 12;
|
|
} elseif ($per == ($life + 1)) {
|
|
$depreciation = ($cost - $previousDepreciation) * $fixedDepreciationRate * (12 - $month) / 12;
|
|
} else {
|
|
$depreciation = ($cost - $previousDepreciation) * $fixedDepreciationRate;
|
|
}
|
|
$previousDepreciation += $depreciation;
|
|
}
|
|
if (PHPExcel_Calculation_Functions::getCompatibilityMode() == PHPExcel_Calculation_Functions::COMPATIBILITY_GNUMERIC) {
|
|
$depreciation = round($depreciation,2);
|
|
}
|
|
return $depreciation;
|
|
}
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
|
} // function DB()
|
|
|
|
|
|
/**
|
|
* DDB
|
|
*
|
|
* Returns the depreciation of an asset for a specified period using the double-declining balance method or some other method you specify.
|
|
*
|
|
* @param float cost Initial cost of the asset.
|
|
* @param float salvage Value at the end of the depreciation. (Sometimes called the salvage value of the asset)
|
|
* @param int life Number of periods over which the asset is depreciated. (Sometimes called the useful life of the asset)
|
|
* @param int period The period for which you want to calculate the depreciation. Period must use the same units as life.
|
|
* @param float factor The rate at which the balance declines.
|
|
* If factor is omitted, it is assumed to be 2 (the double-declining balance method).
|
|
* @return float
|
|
*/
|
|
public static function DDB($cost, $salvage, $life, $period, $factor=2.0) {
|
|
$cost = (float) PHPExcel_Calculation_Functions::flattenSingleValue($cost);
|
|
$salvage = (float) PHPExcel_Calculation_Functions::flattenSingleValue($salvage);
|
|
$life = (int) PHPExcel_Calculation_Functions::flattenSingleValue($life);
|
|
$period = (int) PHPExcel_Calculation_Functions::flattenSingleValue($period);
|
|
$factor = (float) PHPExcel_Calculation_Functions::flattenSingleValue($factor);
|
|
|
|
// Validate
|
|
if ((is_numeric($cost)) && (is_numeric($salvage)) && (is_numeric($life)) && (is_numeric($period)) && (is_numeric($factor))) {
|
|
if (($cost <= 0) || (($salvage / $cost) < 0) || ($life <= 0) || ($period < 1) || ($factor <= 0.0) || ($period > $life)) {
|
|
return PHPExcel_Calculation_Functions::NaN();
|
|
}
|
|
// Set Fixed Depreciation Rate
|
|
$fixedDepreciationRate = 1 - pow(($salvage / $cost), (1 / $life));
|
|
$fixedDepreciationRate = round($fixedDepreciationRate, 3);
|
|
|
|
// Loop through each period calculating the depreciation
|
|
$previousDepreciation = 0;
|
|
for ($per = 1; $per <= $period; ++$per) {
|
|
$depreciation = min( ($cost - $previousDepreciation) * ($factor / $life), ($cost - $salvage - $previousDepreciation) );
|
|
$previousDepreciation += $depreciation;
|
|
}
|
|
if (PHPExcel_Calculation_Functions::getCompatibilityMode() == PHPExcel_Calculation_Functions::COMPATIBILITY_GNUMERIC) {
|
|
$depreciation = round($depreciation,2);
|
|
}
|
|
return $depreciation;
|
|
}
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
|
} // function DDB()
|
|
|
|
|
|
/**
|
|
* DISC
|
|
*
|
|
* Returns the discount rate for a security.
|
|
*
|
|
* @param mixed settlement The security's settlement date.
|
|
* The security settlement date is the date after the issue date when the security is traded to the buyer.
|
|
* @param mixed maturity The security's maturity date.
|
|
* The maturity date is the date when the security expires.
|
|
* @param int price The security's price per $100 face value.
|
|
* @param int redemption the security's redemption value per $100 face value.
|
|
* @param int basis The type of day count to use.
|
|
* 0 or omitted US (NASD) 30/360
|
|
* 1 Actual/actual
|
|
* 2 Actual/360
|
|
* 3 Actual/365
|
|
* 4 European 30/360
|
|
* @return float
|
|
*/
|
|
public static function DISC($settlement, $maturity, $price, $redemption, $basis=0) {
|
|
$settlement = PHPExcel_Calculation_Functions::flattenSingleValue($settlement);
|
|
$maturity = PHPExcel_Calculation_Functions::flattenSingleValue($maturity);
|
|
$price = (float) PHPExcel_Calculation_Functions::flattenSingleValue($price);
|
|
$redemption = (float) PHPExcel_Calculation_Functions::flattenSingleValue($redemption);
|
|
$basis = (int) PHPExcel_Calculation_Functions::flattenSingleValue($basis);
|
|
|
|
// Validate
|
|
if ((is_numeric($price)) && (is_numeric($redemption)) && (is_numeric($basis))) {
|
|
if (($price <= 0) || ($redemption <= 0)) {
|
|
return PHPExcel_Calculation_Functions::NaN();
|
|
}
|
|
$daysBetweenSettlementAndMaturity = PHPExcel_Calculation_DateTime::YEARFRAC($settlement, $maturity, $basis);
|
|
if (!is_numeric($daysBetweenSettlementAndMaturity)) {
|
|
// return date error
|
|
return $daysBetweenSettlementAndMaturity;
|
|
}
|
|
|
|
return ((1 - $price / $redemption) / $daysBetweenSettlementAndMaturity);
|
|
}
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
|
} // function DISC()
|
|
|
|
|
|
/**
|
|
* DOLLARDE
|
|
*
|
|
* Converts a dollar price expressed as an integer part and a fraction part into a dollar price expressed as a decimal number.
|
|
* Fractional dollar numbers are sometimes used for security prices.
|
|
*
|
|
* @param float $fractional_dollar Fractional Dollar
|
|
* @param int $fraction Fraction
|
|
* @return float
|
|
*/
|
|
public static function DOLLARDE($fractional_dollar = Null, $fraction = 0) {
|
|
$fractional_dollar = PHPExcel_Calculation_Functions::flattenSingleValue($fractional_dollar);
|
|
$fraction = (int)PHPExcel_Calculation_Functions::flattenSingleValue($fraction);
|
|
|
|
// Validate parameters
|
|
if (is_null($fractional_dollar) || $fraction < 0) {
|
|
return PHPExcel_Calculation_Functions::NaN();
|
|
}
|
|
if ($fraction == 0) {
|
|
return PHPExcel_Calculation_Functions::DIV0();
|
|
}
|
|
|
|
$dollars = floor($fractional_dollar);
|
|
$cents = fmod($fractional_dollar,1);
|
|
$cents /= $fraction;
|
|
$cents *= pow(10,ceil(log10($fraction)));
|
|
return $dollars + $cents;
|
|
} // function DOLLARDE()
|
|
|
|
|
|
/**
|
|
* DOLLARFR
|
|
*
|
|
* Converts a dollar price expressed as a decimal number into a dollar price expressed as a fraction.
|
|
* Fractional dollar numbers are sometimes used for security prices.
|
|
*
|
|
* @param float $decimal_dollar Decimal Dollar
|
|
* @param int $fraction Fraction
|
|
* @return float
|
|
*/
|
|
public static function DOLLARFR($decimal_dollar = Null, $fraction = 0) {
|
|
$decimal_dollar = PHPExcel_Calculation_Functions::flattenSingleValue($decimal_dollar);
|
|
$fraction = (int)PHPExcel_Calculation_Functions::flattenSingleValue($fraction);
|
|
|
|
// Validate parameters
|
|
if (is_null($decimal_dollar) || $fraction < 0) {
|
|
return PHPExcel_Calculation_Functions::NaN();
|
|
}
|
|
if ($fraction == 0) {
|
|
return PHPExcel_Calculation_Functions::DIV0();
|
|
}
|
|
|
|
$dollars = floor($decimal_dollar);
|
|
$cents = fmod($decimal_dollar,1);
|
|
$cents *= $fraction;
|
|
$cents *= pow(10,-ceil(log10($fraction)));
|
|
return $dollars + $cents;
|
|
} // function DOLLARFR()
|
|
|
|
|
|
/**
|
|
* EFFECT
|
|
*
|
|
* Returns the effective interest rate given the nominal rate and the number of compounding payments per year.
|
|
*
|
|
* @param float $nominal_rate Nominal interest rate
|
|
* @param int $npery Number of compounding payments per year
|
|
* @return float
|
|
*/
|
|
public static function EFFECT($nominal_rate = 0, $npery = 0) {
|
|
$nominal_rate = PHPExcel_Calculation_Functions::flattenSingleValue($nominal_rate);
|
|
$npery = (int)PHPExcel_Calculation_Functions::flattenSingleValue($npery);
|
|
|
|
// Validate parameters
|
|
if ($nominal_rate <= 0 || $npery < 1) {
|
|
return PHPExcel_Calculation_Functions::NaN();
|
|
}
|
|
|
|
return pow((1 + $nominal_rate / $npery), $npery) - 1;
|
|
} // function EFFECT()
|
|
|
|
|
|
/**
|
|
* FV
|
|
*
|
|
* Returns the Future Value of a cash flow with constant payments and interest rate (annuities).
|
|
*
|
|
* @param float $rate Interest rate per period
|
|
* @param int $nper Number of periods
|
|
* @param float $pmt Periodic payment (annuity)
|
|
* @param float $pv Present Value
|
|
* @param int $type Payment type: 0 = at the end of each period, 1 = at the beginning of each period
|
|
* @return float
|
|
*/
|
|
public static function FV($rate = 0, $nper = 0, $pmt = 0, $pv = 0, $type = 0) {
|
|
$rate = PHPExcel_Calculation_Functions::flattenSingleValue($rate);
|
|
$nper = PHPExcel_Calculation_Functions::flattenSingleValue($nper);
|
|
$pmt = PHPExcel_Calculation_Functions::flattenSingleValue($pmt);
|
|
$pv = PHPExcel_Calculation_Functions::flattenSingleValue($pv);
|
|
$type = PHPExcel_Calculation_Functions::flattenSingleValue($type);
|
|
|
|
// Validate parameters
|
|
if ($type != 0 && $type != 1) {
|
|
return PHPExcel_Calculation_Functions::NaN();
|
|
}
|
|
|
|
// Calculate
|
|
if (!is_null($rate) && $rate != 0) {
|
|
return -$pv * pow(1 + $rate, $nper) - $pmt * (1 + $rate * $type) * (pow(1 + $rate, $nper) - 1) / $rate;
|
|
} else {
|
|
return -$pv - $pmt * $nper;
|
|
}
|
|
} // function FV()
|
|
|
|
|
|
/**
|
|
* FVSCHEDULE
|
|
*
|
|
*/
|
|
public static function FVSCHEDULE($principal, $schedule) {
|
|
$principal = PHPExcel_Calculation_Functions::flattenSingleValue($principal);
|
|
$schedule = PHPExcel_Calculation_Functions::flattenArray($schedule);
|
|
|
|
foreach($schedule as $n) {
|
|
$principal *= 1 + $n;
|
|
}
|
|
|
|
return $principal;
|
|
} // function FVSCHEDULE()
|
|
|
|
|
|
/**
|
|
* INTRATE
|
|
*
|
|
* Returns the interest rate for a fully invested security.
|
|
*
|
|
* @param mixed settlement The security's settlement date.
|
|
* The security settlement date is the date after the issue date when the security is traded to the buyer.
|
|
* @param mixed maturity The security's maturity date.
|
|
* The maturity date is the date when the security expires.
|
|
* @param int investment The amount invested in the security.
|
|
* @param int redemption The amount to be received at maturity.
|
|
* @param int basis The type of day count to use.
|
|
* 0 or omitted US (NASD) 30/360
|
|
* 1 Actual/actual
|
|
* 2 Actual/360
|
|
* 3 Actual/365
|
|
* 4 European 30/360
|
|
* @return float
|
|
*/
|
|
public static function INTRATE($settlement, $maturity, $investment, $redemption, $basis=0) {
|
|
$settlement = PHPExcel_Calculation_Functions::flattenSingleValue($settlement);
|
|
$maturity = PHPExcel_Calculation_Functions::flattenSingleValue($maturity);
|
|
$investment = (float) PHPExcel_Calculation_Functions::flattenSingleValue($investment);
|
|
$redemption = (float) PHPExcel_Calculation_Functions::flattenSingleValue($redemption);
|
|
$basis = (int) PHPExcel_Calculation_Functions::flattenSingleValue($basis);
|
|
|
|
// Validate
|
|
if ((is_numeric($investment)) && (is_numeric($redemption)) && (is_numeric($basis))) {
|
|
if (($investment <= 0) || ($redemption <= 0)) {
|
|
return PHPExcel_Calculation_Functions::NaN();
|
|
}
|
|
$daysBetweenSettlementAndMaturity = PHPExcel_Calculation_DateTime::YEARFRAC($settlement, $maturity, $basis);
|
|
if (!is_numeric($daysBetweenSettlementAndMaturity)) {
|
|
// return date error
|
|
return $daysBetweenSettlementAndMaturity;
|
|
}
|
|
|
|
return (($redemption / $investment) - 1) / ($daysBetweenSettlementAndMaturity);
|
|
}
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
|
} // function INTRATE()
|
|
|
|
|
|
/**
|
|
* IPMT
|
|
*
|
|
* Returns the interest payment for a given period for an investment based on periodic, constant payments and a constant interest rate.
|
|
*
|
|
* @param float $rate Interest rate per period
|
|
* @param int $per Period for which we want to find the interest
|
|
* @param int $nper Number of periods
|
|
* @param float $pv Present Value
|
|
* @param float $fv Future Value
|
|
* @param int $type Payment type: 0 = at the end of each period, 1 = at the beginning of each period
|
|
* @return float
|
|
*/
|
|
public static function IPMT($rate, $per, $nper, $pv, $fv = 0, $type = 0) {
|
|
$rate = PHPExcel_Calculation_Functions::flattenSingleValue($rate);
|
|
$per = (int) PHPExcel_Calculation_Functions::flattenSingleValue($per);
|
|
$nper = (int) PHPExcel_Calculation_Functions::flattenSingleValue($nper);
|
|
$pv = PHPExcel_Calculation_Functions::flattenSingleValue($pv);
|
|
$fv = PHPExcel_Calculation_Functions::flattenSingleValue($fv);
|
|
$type = (int) PHPExcel_Calculation_Functions::flattenSingleValue($type);
|
|
|
|
// Validate parameters
|
|
if ($type != 0 && $type != 1) {
|
|
return PHPExcel_Calculation_Functions::NaN();
|
|
}
|
|
if ($per <= 0 || $per > $nper) {
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
|
}
|
|
|
|
// Calculate
|
|
$interestAndPrincipal = self::_interestAndPrincipal($rate, $per, $nper, $pv, $fv, $type);
|
|
return $interestAndPrincipal[0];
|
|
} // function IPMT()
|
|
|
|
|
|
public static function IRR($values, $guess = 0.1) {
|
|
if (!is_array($values)) return PHPExcel_Calculation_Functions::VALUE();
|
|
$values = PHPExcel_Calculation_Functions::flattenArray($values);
|
|
$guess = PHPExcel_Calculation_Functions::flattenSingleValue($guess);
|
|
|
|
// create an initial range, with a root somewhere between 0 and guess
|
|
$x1 = 0.0;
|
|
$x2 = $guess;
|
|
$f1 = self::NPV($x1, $values);
|
|
$f2 = self::NPV($x2, $values);
|
|
for ($i = 0; $i < FINANCIAL_MAX_ITERATIONS; ++$i) {
|
|
if (($f1 * $f2) < 0.0) break;
|
|
if (abs($f1) < abs($f2)) {
|
|
$f1 = self::NPV($x1 += 1.6 * ($x1 - $x2), $values);
|
|
} else {
|
|
$f2 = self::NPV($x2 += 1.6 * ($x2 - $x1), $values);
|
|
}
|
|
}
|
|
if (($f1 * $f2) > 0.0) return PHPExcel_Calculation_Functions::VALUE();
|
|
|
|
$f = self::NPV($x1, $values);
|
|
if ($f < 0.0) {
|
|
$rtb = $x1;
|
|
$dx = $x2 - $x1;
|
|
} else {
|
|
$rtb = $x2;
|
|
$dx = $x1 - $x2;
|
|
}
|
|
|
|
for ($i = 0; $i < FINANCIAL_MAX_ITERATIONS; ++$i) {
|
|
$dx *= 0.5;
|
|
$x_mid = $rtb + $dx;
|
|
$f_mid = self::NPV($x_mid, $values);
|
|
if ($f_mid <= 0.0) $rtb = $x_mid;
|
|
if ((abs($f_mid) < FINANCIAL_PRECISION) || (abs($dx) < FINANCIAL_PRECISION)) return $x_mid;
|
|
}
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
|
} // function IRR()
|
|
|
|
|
|
/**
|
|
* ISPMT
|
|
*
|
|
* Returns the interest payment for an investment based on an interest rate and a constant payment schedule.
|
|
*
|
|
* Excel Function:
|
|
* =ISPMT(interest_rate, period, number_payments, PV)
|
|
*
|
|
* interest_rate is the interest rate for the investment
|
|
*
|
|
* period is the period to calculate the interest rate. It must be betweeen 1 and number_payments.
|
|
*
|
|
* number_payments is the number of payments for the annuity
|
|
*
|
|
* PV is the loan amount or present value of the payments
|
|
*/
|
|
public static function ISPMT() {
|
|
// Return value
|
|
$returnValue = 0;
|
|
|
|
// Get the parameters
|
|
$aArgs = PHPExcel_Calculation_Functions::flattenArray(func_get_args());
|
|
$interestRate = array_shift($aArgs);
|
|
$period = array_shift($aArgs);
|
|
$numberPeriods = array_shift($aArgs);
|
|
$principleRemaining = array_shift($aArgs);
|
|
|
|
// Calculate
|
|
$principlePayment = ($principleRemaining * 1.0) / ($numberPeriods * 1.0);
|
|
for($i=0; $i <= $period; ++$i) {
|
|
$returnValue = $interestRate * $principleRemaining * -1;
|
|
$principleRemaining -= $principlePayment;
|
|
// principle needs to be 0 after the last payment, don't let floating point screw it up
|
|
if($i == $numberPeriods) {
|
|
$returnValue = 0;
|
|
}
|
|
}
|
|
return($returnValue);
|
|
} // function ISPMT()
|
|
|
|
|
|
public static function MIRR($values, $finance_rate, $reinvestment_rate) {
|
|
if (!is_array($values)) return PHPExcel_Calculation_Functions::VALUE();
|
|
$values = PHPExcel_Calculation_Functions::flattenArray($values);
|
|
$finance_rate = PHPExcel_Calculation_Functions::flattenSingleValue($finance_rate);
|
|
$reinvestment_rate = PHPExcel_Calculation_Functions::flattenSingleValue($reinvestment_rate);
|
|
$n = count($values);
|
|
|
|
$rr = 1.0 + $reinvestment_rate;
|
|
$fr = 1.0 + $finance_rate;
|
|
|
|
$npv_pos = $npv_neg = 0.0;
|
|
foreach($values as $i => $v) {
|
|
if ($v >= 0) {
|
|
$npv_pos += $v / pow($rr, $i);
|
|
} else {
|
|
$npv_neg += $v / pow($fr, $i);
|
|
}
|
|
}
|
|
|
|
if (($npv_neg == 0) || ($npv_pos == 0) || ($reinvestment_rate <= -1)) {
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
|
}
|
|
|
|
$mirr = pow((-$npv_pos * pow($rr, $n))
|
|
/ ($npv_neg * ($rr)), (1.0 / ($n - 1))) - 1.0;
|
|
|
|
return (is_finite($mirr) ? $mirr : PHPExcel_Calculation_Functions::VALUE());
|
|
} // function MIRR()
|
|
|
|
|
|
/**
|
|
* NOMINAL
|
|
*
|
|
* Returns the nominal interest rate given the effective rate and the number of compounding payments per year.
|
|
*
|
|
* @param float $effect_rate Effective interest rate
|
|
* @param int $npery Number of compounding payments per year
|
|
* @return float
|
|
*/
|
|
public static function NOMINAL($effect_rate = 0, $npery = 0) {
|
|
$effect_rate = PHPExcel_Calculation_Functions::flattenSingleValue($effect_rate);
|
|
$npery = (int)PHPExcel_Calculation_Functions::flattenSingleValue($npery);
|
|
|
|
// Validate parameters
|
|
if ($effect_rate <= 0 || $npery < 1) {
|
|
return PHPExcel_Calculation_Functions::NaN();
|
|
}
|
|
|
|
// Calculate
|
|
return $npery * (pow($effect_rate + 1, 1 / $npery) - 1);
|
|
} // function NOMINAL()
|
|
|
|
|
|
/**
|
|
* NPER
|
|
*
|
|
* Returns the number of periods for a cash flow with constant periodic payments (annuities), and interest rate.
|
|
*
|
|
* @param float $rate Interest rate per period
|
|
* @param int $pmt Periodic payment (annuity)
|
|
* @param float $pv Present Value
|
|
* @param float $fv Future Value
|
|
* @param int $type Payment type: 0 = at the end of each period, 1 = at the beginning of each period
|
|
* @return float
|
|
*/
|
|
public static function NPER($rate = 0, $pmt = 0, $pv = 0, $fv = 0, $type = 0) {
|
|
$rate = PHPExcel_Calculation_Functions::flattenSingleValue($rate);
|
|
$pmt = PHPExcel_Calculation_Functions::flattenSingleValue($pmt);
|
|
$pv = PHPExcel_Calculation_Functions::flattenSingleValue($pv);
|
|
$fv = PHPExcel_Calculation_Functions::flattenSingleValue($fv);
|
|
$type = PHPExcel_Calculation_Functions::flattenSingleValue($type);
|
|
|
|
// Validate parameters
|
|
if ($type != 0 && $type != 1) {
|
|
return PHPExcel_Calculation_Functions::NaN();
|
|
}
|
|
|
|
// Calculate
|
|
if (!is_null($rate) && $rate != 0) {
|
|
if ($pmt == 0 && $pv == 0) {
|
|
return PHPExcel_Calculation_Functions::NaN();
|
|
}
|
|
return log(($pmt * (1 + $rate * $type) / $rate - $fv) / ($pv + $pmt * (1 + $rate * $type) / $rate)) / log(1 + $rate);
|
|
} else {
|
|
if ($pmt == 0) {
|
|
return PHPExcel_Calculation_Functions::NaN();
|
|
}
|
|
return (-$pv -$fv) / $pmt;
|
|
}
|
|
} // function NPER()
|
|
|
|
|
|
/**
|
|
* NPV
|
|
*
|
|
* Returns the Net Present Value of a cash flow series given a discount rate.
|
|
*
|
|
* @param float Discount interest rate
|
|
* @param array Cash flow series
|
|
* @return float
|
|
*/
|
|
public static function NPV() {
|
|
// Return value
|
|
$returnValue = 0;
|
|
|
|
// Loop through arguments
|
|
$aArgs = PHPExcel_Calculation_Functions::flattenArray(func_get_args());
|
|
|
|
// Calculate
|
|
$rate = array_shift($aArgs);
|
|
for ($i = 1; $i <= count($aArgs); ++$i) {
|
|
// Is it a numeric value?
|
|
if (is_numeric($aArgs[$i - 1])) {
|
|
$returnValue += $aArgs[$i - 1] / pow(1 + $rate, $i);
|
|
}
|
|
}
|
|
|
|
// Return
|
|
return $returnValue;
|
|
} // function NPV()
|
|
|
|
|
|
/**
|
|
* PMT
|
|
*
|
|
* Returns the constant payment (annuity) for a cash flow with a constant interest rate.
|
|
*
|
|
* @param float $rate Interest rate per period
|
|
* @param int $nper Number of periods
|
|
* @param float $pv Present Value
|
|
* @param float $fv Future Value
|
|
* @param int $type Payment type: 0 = at the end of each period, 1 = at the beginning of each period
|
|
* @return float
|
|
*/
|
|
public static function PMT($rate = 0, $nper = 0, $pv = 0, $fv = 0, $type = 0) {
|
|
$rate = PHPExcel_Calculation_Functions::flattenSingleValue($rate);
|
|
$nper = PHPExcel_Calculation_Functions::flattenSingleValue($nper);
|
|
$pv = PHPExcel_Calculation_Functions::flattenSingleValue($pv);
|
|
$fv = PHPExcel_Calculation_Functions::flattenSingleValue($fv);
|
|
$type = PHPExcel_Calculation_Functions::flattenSingleValue($type);
|
|
|
|
// Validate parameters
|
|
if ($type != 0 && $type != 1) {
|
|
return PHPExcel_Calculation_Functions::NaN();
|
|
}
|
|
|
|
// Calculate
|
|
if (!is_null($rate) && $rate != 0) {
|
|
return (-$fv - $pv * pow(1 + $rate, $nper)) / (1 + $rate * $type) / ((pow(1 + $rate, $nper) - 1) / $rate);
|
|
} else {
|
|
return (-$pv - $fv) / $nper;
|
|
}
|
|
} // function PMT()
|
|
|
|
|
|
/**
|
|
* PPMT
|
|
*
|
|
* Returns the interest payment for a given period for an investment based on periodic, constant payments and a constant interest rate.
|
|
*
|
|
* @param float $rate Interest rate per period
|
|
* @param int $per Period for which we want to find the interest
|
|
* @param int $nper Number of periods
|
|
* @param float $pv Present Value
|
|
* @param float $fv Future Value
|
|
* @param int $type Payment type: 0 = at the end of each period, 1 = at the beginning of each period
|
|
* @return float
|
|
*/
|
|
public static function PPMT($rate, $per, $nper, $pv, $fv = 0, $type = 0) {
|
|
$rate = PHPExcel_Calculation_Functions::flattenSingleValue($rate);
|
|
$per = (int) PHPExcel_Calculation_Functions::flattenSingleValue($per);
|
|
$nper = (int) PHPExcel_Calculation_Functions::flattenSingleValue($nper);
|
|
$pv = PHPExcel_Calculation_Functions::flattenSingleValue($pv);
|
|
$fv = PHPExcel_Calculation_Functions::flattenSingleValue($fv);
|
|
$type = (int) PHPExcel_Calculation_Functions::flattenSingleValue($type);
|
|
|
|
// Validate parameters
|
|
if ($type != 0 && $type != 1) {
|
|
return PHPExcel_Calculation_Functions::NaN();
|
|
}
|
|
if ($per <= 0 || $per > $nper) {
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
|
}
|
|
|
|
// Calculate
|
|
$interestAndPrincipal = self::_interestAndPrincipal($rate, $per, $nper, $pv, $fv, $type);
|
|
return $interestAndPrincipal[1];
|
|
} // function PPMT()
|
|
|
|
|
|
public static function PRICE($settlement, $maturity, $rate, $yield, $redemption, $frequency, $basis=0) {
|
|
$settlement = PHPExcel_Calculation_Functions::flattenSingleValue($settlement);
|
|
$maturity = PHPExcel_Calculation_Functions::flattenSingleValue($maturity);
|
|
$rate = (float) PHPExcel_Calculation_Functions::flattenSingleValue($rate);
|
|
$yield = (float) PHPExcel_Calculation_Functions::flattenSingleValue($yield);
|
|
$redemption = (float) PHPExcel_Calculation_Functions::flattenSingleValue($redemption);
|
|
$frequency = (int) PHPExcel_Calculation_Functions::flattenSingleValue($frequency);
|
|
$basis = (is_null($basis)) ? 0 : (int) PHPExcel_Calculation_Functions::flattenSingleValue($basis);
|
|
|
|
if (is_string($settlement = PHPExcel_Calculation_DateTime::_getDateValue($settlement))) {
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
|
}
|
|
if (is_string($maturity = PHPExcel_Calculation_DateTime::_getDateValue($maturity))) {
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
|
}
|
|
|
|
if (($settlement > $maturity) ||
|
|
(!self::_validFrequency($frequency)) ||
|
|
(($basis < 0) || ($basis > 4))) {
|
|
return PHPExcel_Calculation_Functions::NaN();
|
|
}
|
|
|
|
$dsc = self::COUPDAYSNC($settlement, $maturity, $frequency, $basis);
|
|
$e = self::COUPDAYS($settlement, $maturity, $frequency, $basis);
|
|
$n = self::COUPNUM($settlement, $maturity, $frequency, $basis);
|
|
$a = self::COUPDAYBS($settlement, $maturity, $frequency, $basis);
|
|
|
|
$baseYF = 1.0 + ($yield / $frequency);
|
|
$rfp = 100 * ($rate / $frequency);
|
|
$de = $dsc / $e;
|
|
|
|
$result = $redemption / pow($baseYF, (--$n + $de));
|
|
for($k = 0; $k <= $n; ++$k) {
|
|
$result += $rfp / (pow($baseYF, ($k + $de)));
|
|
}
|
|
$result -= $rfp * ($a / $e);
|
|
|
|
return $result;
|
|
} // function PRICE()
|
|
|
|
|
|
/**
|
|
* PRICEDISC
|
|
*
|
|
* Returns the price per $100 face value of a discounted security.
|
|
*
|
|
* @param mixed settlement The security's settlement date.
|
|
* The security settlement date is the date after the issue date when the security is traded to the buyer.
|
|
* @param mixed maturity The security's maturity date.
|
|
* The maturity date is the date when the security expires.
|
|
* @param int discount The security's discount rate.
|
|
* @param int redemption The security's redemption value per $100 face value.
|
|
* @param int basis The type of day count to use.
|
|
* 0 or omitted US (NASD) 30/360
|
|
* 1 Actual/actual
|
|
* 2 Actual/360
|
|
* 3 Actual/365
|
|
* 4 European 30/360
|
|
* @return float
|
|
*/
|
|
public static function PRICEDISC($settlement, $maturity, $discount, $redemption, $basis=0) {
|
|
$settlement = PHPExcel_Calculation_Functions::flattenSingleValue($settlement);
|
|
$maturity = PHPExcel_Calculation_Functions::flattenSingleValue($maturity);
|
|
$discount = (float) PHPExcel_Calculation_Functions::flattenSingleValue($discount);
|
|
$redemption = (float) PHPExcel_Calculation_Functions::flattenSingleValue($redemption);
|
|
$basis = (int) PHPExcel_Calculation_Functions::flattenSingleValue($basis);
|
|
|
|
// Validate
|
|
if ((is_numeric($discount)) && (is_numeric($redemption)) && (is_numeric($basis))) {
|
|
if (($discount <= 0) || ($redemption <= 0)) {
|
|
return PHPExcel_Calculation_Functions::NaN();
|
|
}
|
|
$daysBetweenSettlementAndMaturity = PHPExcel_Calculation_DateTime::YEARFRAC($settlement, $maturity, $basis);
|
|
if (!is_numeric($daysBetweenSettlementAndMaturity)) {
|
|
// return date error
|
|
return $daysBetweenSettlementAndMaturity;
|
|
}
|
|
|
|
return $redemption * (1 - $discount * $daysBetweenSettlementAndMaturity);
|
|
}
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
|
} // function PRICEDISC()
|
|
|
|
|
|
/**
|
|
* PRICEMAT
|
|
*
|
|
* Returns the price per $100 face value of a security that pays interest at maturity.
|
|
*
|
|
* @param mixed settlement The security's settlement date.
|
|
* The security's settlement date is the date after the issue date when the security is traded to the buyer.
|
|
* @param mixed maturity The security's maturity date.
|
|
* The maturity date is the date when the security expires.
|
|
* @param mixed issue The security's issue date.
|
|
* @param int rate The security's interest rate at date of issue.
|
|
* @param int yield The security's annual yield.
|
|
* @param int basis The type of day count to use.
|
|
* 0 or omitted US (NASD) 30/360
|
|
* 1 Actual/actual
|
|
* 2 Actual/360
|
|
* 3 Actual/365
|
|
* 4 European 30/360
|
|
* @return float
|
|
*/
|
|
public static function PRICEMAT($settlement, $maturity, $issue, $rate, $yield, $basis=0) {
|
|
$settlement = PHPExcel_Calculation_Functions::flattenSingleValue($settlement);
|
|
$maturity = PHPExcel_Calculation_Functions::flattenSingleValue($maturity);
|
|
$issue = PHPExcel_Calculation_Functions::flattenSingleValue($issue);
|
|
$rate = PHPExcel_Calculation_Functions::flattenSingleValue($rate);
|
|
$yield = PHPExcel_Calculation_Functions::flattenSingleValue($yield);
|
|
$basis = (int) PHPExcel_Calculation_Functions::flattenSingleValue($basis);
|
|
|
|
// Validate
|
|
if (is_numeric($rate) && is_numeric($yield)) {
|
|
if (($rate <= 0) || ($yield <= 0)) {
|
|
return PHPExcel_Calculation_Functions::NaN();
|
|
}
|
|
$daysPerYear = self::_daysPerYear(PHPExcel_Calculation_DateTime::YEAR($settlement),$basis);
|
|
if (!is_numeric($daysPerYear)) {
|
|
return $daysPerYear;
|
|
}
|
|
$daysBetweenIssueAndSettlement = PHPExcel_Calculation_DateTime::YEARFRAC($issue, $settlement, $basis);
|
|
if (!is_numeric($daysBetweenIssueAndSettlement)) {
|
|
// return date error
|
|
return $daysBetweenIssueAndSettlement;
|
|
}
|
|
$daysBetweenIssueAndSettlement *= $daysPerYear;
|
|
$daysBetweenIssueAndMaturity = PHPExcel_Calculation_DateTime::YEARFRAC($issue, $maturity, $basis);
|
|
if (!is_numeric($daysBetweenIssueAndMaturity)) {
|
|
// return date error
|
|
return $daysBetweenIssueAndMaturity;
|
|
}
|
|
$daysBetweenIssueAndMaturity *= $daysPerYear;
|
|
$daysBetweenSettlementAndMaturity = PHPExcel_Calculation_DateTime::YEARFRAC($settlement, $maturity, $basis);
|
|
if (!is_numeric($daysBetweenSettlementAndMaturity)) {
|
|
// return date error
|
|
return $daysBetweenSettlementAndMaturity;
|
|
}
|
|
$daysBetweenSettlementAndMaturity *= $daysPerYear;
|
|
|
|
return ((100 + (($daysBetweenIssueAndMaturity / $daysPerYear) * $rate * 100)) /
|
|
(1 + (($daysBetweenSettlementAndMaturity / $daysPerYear) * $yield)) -
|
|
(($daysBetweenIssueAndSettlement / $daysPerYear) * $rate * 100));
|
|
}
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
|
} // function PRICEMAT()
|
|
|
|
|
|
/**
|
|
* PV
|
|
*
|
|
* Returns the Present Value of a cash flow with constant payments and interest rate (annuities).
|
|
*
|
|
* @param float $rate Interest rate per period
|
|
* @param int $nper Number of periods
|
|
* @param float $pmt Periodic payment (annuity)
|
|
* @param float $fv Future Value
|
|
* @param int $type Payment type: 0 = at the end of each period, 1 = at the beginning of each period
|
|
* @return float
|
|
*/
|
|
public static function PV($rate = 0, $nper = 0, $pmt = 0, $fv = 0, $type = 0) {
|
|
$rate = PHPExcel_Calculation_Functions::flattenSingleValue($rate);
|
|
$nper = PHPExcel_Calculation_Functions::flattenSingleValue($nper);
|
|
$pmt = PHPExcel_Calculation_Functions::flattenSingleValue($pmt);
|
|
$fv = PHPExcel_Calculation_Functions::flattenSingleValue($fv);
|
|
$type = PHPExcel_Calculation_Functions::flattenSingleValue($type);
|
|
|
|
// Validate parameters
|
|
if ($type != 0 && $type != 1) {
|
|
return PHPExcel_Calculation_Functions::NaN();
|
|
}
|
|
|
|
// Calculate
|
|
if (!is_null($rate) && $rate != 0) {
|
|
return (-$pmt * (1 + $rate * $type) * ((pow(1 + $rate, $nper) - 1) / $rate) - $fv) / pow(1 + $rate, $nper);
|
|
} else {
|
|
return -$fv - $pmt * $nper;
|
|
}
|
|
} // function PV()
|
|
|
|
|
|
/**
|
|
* RATE
|
|
*
|
|
**/
|
|
public static function RATE($nper, $pmt, $pv, $fv = 0.0, $type = 0, $guess = 0.1) {
|
|
$nper = (int) PHPExcel_Calculation_Functions::flattenSingleValue($nper);
|
|
$pmt = PHPExcel_Calculation_Functions::flattenSingleValue($pmt);
|
|
$pv = PHPExcel_Calculation_Functions::flattenSingleValue($pv);
|
|
$fv = (is_null($fv)) ? 0.0 : PHPExcel_Calculation_Functions::flattenSingleValue($fv);
|
|
$type = (is_null($type)) ? 0 : (int) PHPExcel_Calculation_Functions::flattenSingleValue($type);
|
|
$guess = (is_null($guess)) ? 0.1 : PHPExcel_Calculation_Functions::flattenSingleValue($guess);
|
|
|
|
$rate = $guess;
|
|
if (abs($rate) < FINANCIAL_PRECISION) {
|
|
$y = $pv * (1 + $nper * $rate) + $pmt * (1 + $rate * $type) * $nper + $fv;
|
|
} else {
|
|
$f = exp($nper * log(1 + $rate));
|
|
$y = $pv * $f + $pmt * (1 / $rate + $type) * ($f - 1) + $fv;
|
|
}
|
|
$y0 = $pv + $pmt * $nper + $fv;
|
|
$y1 = $pv * $f + $pmt * (1 / $rate + $type) * ($f - 1) + $fv;
|
|
|
|
// find root by secant method
|
|
$i = $x0 = 0.0;
|
|
$x1 = $rate;
|
|
while ((abs($y0 - $y1) > FINANCIAL_PRECISION) && ($i < FINANCIAL_MAX_ITERATIONS)) {
|
|
$rate = ($y1 * $x0 - $y0 * $x1) / ($y1 - $y0);
|
|
$x0 = $x1;
|
|
$x1 = $rate;
|
|
|
|
if (abs($rate) < FINANCIAL_PRECISION) {
|
|
$y = $pv * (1 + $nper * $rate) + $pmt * (1 + $rate * $type) * $nper + $fv;
|
|
} else {
|
|
$f = exp($nper * log(1 + $rate));
|
|
$y = $pv * $f + $pmt * (1 / $rate + $type) * ($f - 1) + $fv;
|
|
}
|
|
|
|
$y0 = $y1;
|
|
$y1 = $y;
|
|
++$i;
|
|
}
|
|
return $rate;
|
|
} // function RATE()
|
|
|
|
|
|
/**
|
|
* RECEIVED
|
|
*
|
|
* Returns the price per $100 face value of a discounted security.
|
|
*
|
|
* @param mixed settlement The security's settlement date.
|
|
* The security settlement date is the date after the issue date when the security is traded to the buyer.
|
|
* @param mixed maturity The security's maturity date.
|
|
* The maturity date is the date when the security expires.
|
|
* @param int investment The amount invested in the security.
|
|
* @param int discount The security's discount rate.
|
|
* @param int basis The type of day count to use.
|
|
* 0 or omitted US (NASD) 30/360
|
|
* 1 Actual/actual
|
|
* 2 Actual/360
|
|
* 3 Actual/365
|
|
* 4 European 30/360
|
|
* @return float
|
|
*/
|
|
public static function RECEIVED($settlement, $maturity, $investment, $discount, $basis=0) {
|
|
$settlement = PHPExcel_Calculation_Functions::flattenSingleValue($settlement);
|
|
$maturity = PHPExcel_Calculation_Functions::flattenSingleValue($maturity);
|
|
$investment = (float) PHPExcel_Calculation_Functions::flattenSingleValue($investment);
|
|
$discount = (float) PHPExcel_Calculation_Functions::flattenSingleValue($discount);
|
|
$basis = (int) PHPExcel_Calculation_Functions::flattenSingleValue($basis);
|
|
|
|
// Validate
|
|
if ((is_numeric($investment)) && (is_numeric($discount)) && (is_numeric($basis))) {
|
|
if (($investment <= 0) || ($discount <= 0)) {
|
|
return PHPExcel_Calculation_Functions::NaN();
|
|
}
|
|
$daysBetweenSettlementAndMaturity = PHPExcel_Calculation_DateTime::YEARFRAC($settlement, $maturity, $basis);
|
|
if (!is_numeric($daysBetweenSettlementAndMaturity)) {
|
|
// return date error
|
|
return $daysBetweenSettlementAndMaturity;
|
|
}
|
|
|
|
return $investment / ( 1 - ($discount * $daysBetweenSettlementAndMaturity));
|
|
}
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
|
} // function RECEIVED()
|
|
|
|
|
|
/**
|
|
* SLN
|
|
*
|
|
* Returns the straight-line depreciation of an asset for one period
|
|
*
|
|
* @param cost Initial cost of the asset
|
|
* @param salvage Value at the end of the depreciation
|
|
* @param life Number of periods over which the asset is depreciated
|
|
* @return float
|
|
*/
|
|
public static function SLN($cost, $salvage, $life) {
|
|
$cost = PHPExcel_Calculation_Functions::flattenSingleValue($cost);
|
|
$salvage = PHPExcel_Calculation_Functions::flattenSingleValue($salvage);
|
|
$life = PHPExcel_Calculation_Functions::flattenSingleValue($life);
|
|
|
|
// Calculate
|
|
if ((is_numeric($cost)) && (is_numeric($salvage)) && (is_numeric($life))) {
|
|
if ($life < 0) {
|
|
return PHPExcel_Calculation_Functions::NaN();
|
|
}
|
|
return ($cost - $salvage) / $life;
|
|
}
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
|
} // function SLN()
|
|
|
|
|
|
/**
|
|
* SYD
|
|
*
|
|
* Returns the sum-of-years' digits depreciation of an asset for a specified period.
|
|
*
|
|
* @param cost Initial cost of the asset
|
|
* @param salvage Value at the end of the depreciation
|
|
* @param life Number of periods over which the asset is depreciated
|
|
* @param period Period
|
|
* @return float
|
|
*/
|
|
public static function SYD($cost, $salvage, $life, $period) {
|
|
$cost = PHPExcel_Calculation_Functions::flattenSingleValue($cost);
|
|
$salvage = PHPExcel_Calculation_Functions::flattenSingleValue($salvage);
|
|
$life = PHPExcel_Calculation_Functions::flattenSingleValue($life);
|
|
$period = PHPExcel_Calculation_Functions::flattenSingleValue($period);
|
|
|
|
// Calculate
|
|
if ((is_numeric($cost)) && (is_numeric($salvage)) && (is_numeric($life)) && (is_numeric($period))) {
|
|
if (($life < 1) || ($period > $life)) {
|
|
return PHPExcel_Calculation_Functions::NaN();
|
|
}
|
|
return (($cost - $salvage) * ($life - $period + 1) * 2) / ($life * ($life + 1));
|
|
}
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
|
} // function SYD()
|
|
|
|
|
|
/**
|
|
* TBILLEQ
|
|
*
|
|
* Returns the bond-equivalent yield for a Treasury bill.
|
|
*
|
|
* @param mixed settlement The Treasury bill's settlement date.
|
|
* The Treasury bill's settlement date is the date after the issue date when the Treasury bill is traded to the buyer.
|
|
* @param mixed maturity The Treasury bill's maturity date.
|
|
* The maturity date is the date when the Treasury bill expires.
|
|
* @param int discount The Treasury bill's discount rate.
|
|
* @return float
|
|
*/
|
|
public static function TBILLEQ($settlement, $maturity, $discount) {
|
|
$settlement = PHPExcel_Calculation_Functions::flattenSingleValue($settlement);
|
|
$maturity = PHPExcel_Calculation_Functions::flattenSingleValue($maturity);
|
|
$discount = PHPExcel_Calculation_Functions::flattenSingleValue($discount);
|
|
|
|
// Use TBILLPRICE for validation
|
|
$testValue = self::TBILLPRICE($settlement, $maturity, $discount);
|
|
if (is_string($testValue)) {
|
|
return $testValue;
|
|
}
|
|
|
|
if (is_string($maturity = PHPExcel_Calculation_DateTime::_getDateValue($maturity))) {
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
|
}
|
|
|
|
if (PHPExcel_Calculation_Functions::getCompatibilityMode() == PHPExcel_Calculation_Functions::COMPATIBILITY_OPENOFFICE) {
|
|
++$maturity;
|
|
$daysBetweenSettlementAndMaturity = PHPExcel_Calculation_DateTime::YEARFRAC($settlement, $maturity) * 360;
|
|
} else {
|
|
$daysBetweenSettlementAndMaturity = (PHPExcel_Calculation_DateTime::_getDateValue($maturity) - PHPExcel_Calculation_DateTime::_getDateValue($settlement));
|
|
}
|
|
|
|
return (365 * $discount) / (360 - $discount * $daysBetweenSettlementAndMaturity);
|
|
} // function TBILLEQ()
|
|
|
|
|
|
/**
|
|
* TBILLPRICE
|
|
*
|
|
* Returns the yield for a Treasury bill.
|
|
*
|
|
* @param mixed settlement The Treasury bill's settlement date.
|
|
* The Treasury bill's settlement date is the date after the issue date when the Treasury bill is traded to the buyer.
|
|
* @param mixed maturity The Treasury bill's maturity date.
|
|
* The maturity date is the date when the Treasury bill expires.
|
|
* @param int discount The Treasury bill's discount rate.
|
|
* @return float
|
|
*/
|
|
public static function TBILLPRICE($settlement, $maturity, $discount) {
|
|
$settlement = PHPExcel_Calculation_Functions::flattenSingleValue($settlement);
|
|
$maturity = PHPExcel_Calculation_Functions::flattenSingleValue($maturity);
|
|
$discount = PHPExcel_Calculation_Functions::flattenSingleValue($discount);
|
|
|
|
if (is_string($maturity = PHPExcel_Calculation_DateTime::_getDateValue($maturity))) {
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
|
}
|
|
|
|
// Validate
|
|
if (is_numeric($discount)) {
|
|
if ($discount <= 0) {
|
|
return PHPExcel_Calculation_Functions::NaN();
|
|
}
|
|
|
|
if (PHPExcel_Calculation_Functions::getCompatibilityMode() == PHPExcel_Calculation_Functions::COMPATIBILITY_OPENOFFICE) {
|
|
++$maturity;
|
|
$daysBetweenSettlementAndMaturity = PHPExcel_Calculation_DateTime::YEARFRAC($settlement, $maturity) * 360;
|
|
if (!is_numeric($daysBetweenSettlementAndMaturity)) {
|
|
// return date error
|
|
return $daysBetweenSettlementAndMaturity;
|
|
}
|
|
} else {
|
|
$daysBetweenSettlementAndMaturity = (PHPExcel_Calculation_DateTime::_getDateValue($maturity) - PHPExcel_Calculation_DateTime::_getDateValue($settlement));
|
|
}
|
|
|
|
if ($daysBetweenSettlementAndMaturity > 360) {
|
|
return PHPExcel_Calculation_Functions::NaN();
|
|
}
|
|
|
|
$price = 100 * (1 - (($discount * $daysBetweenSettlementAndMaturity) / 360));
|
|
if ($price <= 0) {
|
|
return PHPExcel_Calculation_Functions::NaN();
|
|
}
|
|
return $price;
|
|
}
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
|
} // function TBILLPRICE()
|
|
|
|
|
|
/**
|
|
* TBILLYIELD
|
|
*
|
|
* Returns the yield for a Treasury bill.
|
|
*
|
|
* @param mixed settlement The Treasury bill's settlement date.
|
|
* The Treasury bill's settlement date is the date after the issue date when the Treasury bill is traded to the buyer.
|
|
* @param mixed maturity The Treasury bill's maturity date.
|
|
* The maturity date is the date when the Treasury bill expires.
|
|
* @param int price The Treasury bill's price per $100 face value.
|
|
* @return float
|
|
*/
|
|
public static function TBILLYIELD($settlement, $maturity, $price) {
|
|
$settlement = PHPExcel_Calculation_Functions::flattenSingleValue($settlement);
|
|
$maturity = PHPExcel_Calculation_Functions::flattenSingleValue($maturity);
|
|
$price = PHPExcel_Calculation_Functions::flattenSingleValue($price);
|
|
|
|
// Validate
|
|
if (is_numeric($price)) {
|
|
if ($price <= 0) {
|
|
return PHPExcel_Calculation_Functions::NaN();
|
|
}
|
|
|
|
if (PHPExcel_Calculation_Functions::getCompatibilityMode() == PHPExcel_Calculation_Functions::COMPATIBILITY_OPENOFFICE) {
|
|
++$maturity;
|
|
$daysBetweenSettlementAndMaturity = PHPExcel_Calculation_DateTime::YEARFRAC($settlement, $maturity) * 360;
|
|
if (!is_numeric($daysBetweenSettlementAndMaturity)) {
|
|
// return date error
|
|
return $daysBetweenSettlementAndMaturity;
|
|
}
|
|
} else {
|
|
$daysBetweenSettlementAndMaturity = (PHPExcel_Calculation_DateTime::_getDateValue($maturity) - PHPExcel_Calculation_DateTime::_getDateValue($settlement));
|
|
}
|
|
|
|
if ($daysBetweenSettlementAndMaturity > 360) {
|
|
return PHPExcel_Calculation_Functions::NaN();
|
|
}
|
|
|
|
return ((100 - $price) / $price) * (360 / $daysBetweenSettlementAndMaturity);
|
|
}
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
|
} // function TBILLYIELD()
|
|
|
|
|
|
public static function XIRR($values, $dates, $guess = 0.1) {
|
|
if ((!is_array($values)) && (!is_array($dates))) return PHPExcel_Calculation_Functions::VALUE();
|
|
$values = PHPExcel_Calculation_Functions::flattenArray($values);
|
|
$dates = PHPExcel_Calculation_Functions::flattenArray($dates);
|
|
$guess = PHPExcel_Calculation_Functions::flattenSingleValue($guess);
|
|
if (count($values) != count($dates)) return PHPExcel_Calculation_Functions::NaN();
|
|
|
|
// create an initial range, with a root somewhere between 0 and guess
|
|
$x1 = 0.0;
|
|
$x2 = $guess;
|
|
$f1 = self::XNPV($x1, $values, $dates);
|
|
$f2 = self::XNPV($x2, $values, $dates);
|
|
for ($i = 0; $i < FINANCIAL_MAX_ITERATIONS; ++$i) {
|
|
if (($f1 * $f2) < 0.0) break;
|
|
if (abs($f1) < abs($f2)) {
|
|
$f1 = self::XNPV($x1 += 1.6 * ($x1 - $x2), $values, $dates);
|
|
} else {
|
|
$f2 = self::XNPV($x2 += 1.6 * ($x2 - $x1), $values, $dates);
|
|
}
|
|
}
|
|
if (($f1 * $f2) > 0.0) return PHPExcel_Calculation_Functions::VALUE();
|
|
|
|
$f = self::XNPV($x1, $values, $dates);
|
|
if ($f < 0.0) {
|
|
$rtb = $x1;
|
|
$dx = $x2 - $x1;
|
|
} else {
|
|
$rtb = $x2;
|
|
$dx = $x1 - $x2;
|
|
}
|
|
|
|
for ($i = 0; $i < FINANCIAL_MAX_ITERATIONS; ++$i) {
|
|
$dx *= 0.5;
|
|
$x_mid = $rtb + $dx;
|
|
$f_mid = self::XNPV($x_mid, $values, $dates);
|
|
if ($f_mid <= 0.0) $rtb = $x_mid;
|
|
if ((abs($f_mid) < FINANCIAL_PRECISION) || (abs($dx) < FINANCIAL_PRECISION)) return $x_mid;
|
|
}
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
|
}
|
|
|
|
|
|
/**
|
|
* XNPV
|
|
*
|
|
* Returns the net present value for a schedule of cash flows that is not necessarily periodic.
|
|
* To calculate the net present value for a series of cash flows that is periodic, use the NPV function.
|
|
*
|
|
* Excel Function:
|
|
* =XNPV(rate,values,dates)
|
|
*
|
|
* @param float $rate The discount rate to apply to the cash flows.
|
|
* @param array of float $values A series of cash flows that corresponds to a schedule of payments in dates. The first payment is optional and corresponds to a cost or payment that occurs at the beginning of the investment. If the first value is a cost or payment, it must be a negative value. All succeeding payments are discounted based on a 365-day year. The series of values must contain at least one positive value and one negative value.
|
|
* @param array of mixed $dates A schedule of payment dates that corresponds to the cash flow payments. The first payment date indicates the beginning of the schedule of payments. All other dates must be later than this date, but they may occur in any order.
|
|
* @return float
|
|
*/
|
|
public static function XNPV($rate, $values, $dates) {
|
|
$rate = PHPExcel_Calculation_Functions::flattenSingleValue($rate);
|
|
if (!is_numeric($rate)) return PHPExcel_Calculation_Functions::VALUE();
|
|
if ((!is_array($values)) || (!is_array($dates))) return PHPExcel_Calculation_Functions::VALUE();
|
|
$values = PHPExcel_Calculation_Functions::flattenArray($values);
|
|
$dates = PHPExcel_Calculation_Functions::flattenArray($dates);
|
|
$valCount = count($values);
|
|
if ($valCount != count($dates)) return PHPExcel_Calculation_Functions::NaN();
|
|
if ((min($values) > 0) || (max($values) < 0)) return PHPExcel_Calculation_Functions::VALUE();
|
|
|
|
$xnpv = 0.0;
|
|
for ($i = 0; $i < $valCount; ++$i) {
|
|
if (!is_numeric($values[$i])) return PHPExcel_Calculation_Functions::VALUE();
|
|
$xnpv += $values[$i] / pow(1 + $rate, PHPExcel_Calculation_DateTime::DATEDIF($dates[0],$dates[$i],'d') / 365);
|
|
}
|
|
return (is_finite($xnpv)) ? $xnpv : PHPExcel_Calculation_Functions::VALUE();
|
|
} // function XNPV()
|
|
|
|
|
|
/**
|
|
* YIELDDISC
|
|
*
|
|
* Returns the annual yield of a security that pays interest at maturity.
|
|
*
|
|
* @param mixed settlement The security's settlement date.
|
|
* The security's settlement date is the date after the issue date when the security is traded to the buyer.
|
|
* @param mixed maturity The security's maturity date.
|
|
* The maturity date is the date when the security expires.
|
|
* @param int price The security's price per $100 face value.
|
|
* @param int redemption The security's redemption value per $100 face value.
|
|
* @param int basis The type of day count to use.
|
|
* 0 or omitted US (NASD) 30/360
|
|
* 1 Actual/actual
|
|
* 2 Actual/360
|
|
* 3 Actual/365
|
|
* 4 European 30/360
|
|
* @return float
|
|
*/
|
|
public static function YIELDDISC($settlement, $maturity, $price, $redemption, $basis=0) {
|
|
$settlement = PHPExcel_Calculation_Functions::flattenSingleValue($settlement);
|
|
$maturity = PHPExcel_Calculation_Functions::flattenSingleValue($maturity);
|
|
$price = PHPExcel_Calculation_Functions::flattenSingleValue($price);
|
|
$redemption = PHPExcel_Calculation_Functions::flattenSingleValue($redemption);
|
|
$basis = (int) PHPExcel_Calculation_Functions::flattenSingleValue($basis);
|
|
|
|
// Validate
|
|
if (is_numeric($price) && is_numeric($redemption)) {
|
|
if (($price <= 0) || ($redemption <= 0)) {
|
|
return PHPExcel_Calculation_Functions::NaN();
|
|
}
|
|
$daysPerYear = self::_daysPerYear(PHPExcel_Calculation_DateTime::YEAR($settlement),$basis);
|
|
if (!is_numeric($daysPerYear)) {
|
|
return $daysPerYear;
|
|
}
|
|
$daysBetweenSettlementAndMaturity = PHPExcel_Calculation_DateTime::YEARFRAC($settlement, $maturity,$basis);
|
|
if (!is_numeric($daysBetweenSettlementAndMaturity)) {
|
|
// return date error
|
|
return $daysBetweenSettlementAndMaturity;
|
|
}
|
|
$daysBetweenSettlementAndMaturity *= $daysPerYear;
|
|
|
|
return (($redemption - $price) / $price) * ($daysPerYear / $daysBetweenSettlementAndMaturity);
|
|
}
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
|
} // function YIELDDISC()
|
|
|
|
|
|
/**
|
|
* YIELDMAT
|
|
*
|
|
* Returns the annual yield of a security that pays interest at maturity.
|
|
*
|
|
* @param mixed settlement The security's settlement date.
|
|
* The security's settlement date is the date after the issue date when the security is traded to the buyer.
|
|
* @param mixed maturity The security's maturity date.
|
|
* The maturity date is the date when the security expires.
|
|
* @param mixed issue The security's issue date.
|
|
* @param int rate The security's interest rate at date of issue.
|
|
* @param int price The security's price per $100 face value.
|
|
* @param int basis The type of day count to use.
|
|
* 0 or omitted US (NASD) 30/360
|
|
* 1 Actual/actual
|
|
* 2 Actual/360
|
|
* 3 Actual/365
|
|
* 4 European 30/360
|
|
* @return float
|
|
*/
|
|
public static function YIELDMAT($settlement, $maturity, $issue, $rate, $price, $basis=0) {
|
|
$settlement = PHPExcel_Calculation_Functions::flattenSingleValue($settlement);
|
|
$maturity = PHPExcel_Calculation_Functions::flattenSingleValue($maturity);
|
|
$issue = PHPExcel_Calculation_Functions::flattenSingleValue($issue);
|
|
$rate = PHPExcel_Calculation_Functions::flattenSingleValue($rate);
|
|
$price = PHPExcel_Calculation_Functions::flattenSingleValue($price);
|
|
$basis = (int) PHPExcel_Calculation_Functions::flattenSingleValue($basis);
|
|
|
|
// Validate
|
|
if (is_numeric($rate) && is_numeric($price)) {
|
|
if (($rate <= 0) || ($price <= 0)) {
|
|
return PHPExcel_Calculation_Functions::NaN();
|
|
}
|
|
$daysPerYear = self::_daysPerYear(PHPExcel_Calculation_DateTime::YEAR($settlement),$basis);
|
|
if (!is_numeric($daysPerYear)) {
|
|
return $daysPerYear;
|
|
}
|
|
$daysBetweenIssueAndSettlement = PHPExcel_Calculation_DateTime::YEARFRAC($issue, $settlement, $basis);
|
|
if (!is_numeric($daysBetweenIssueAndSettlement)) {
|
|
// return date error
|
|
return $daysBetweenIssueAndSettlement;
|
|
}
|
|
$daysBetweenIssueAndSettlement *= $daysPerYear;
|
|
$daysBetweenIssueAndMaturity = PHPExcel_Calculation_DateTime::YEARFRAC($issue, $maturity, $basis);
|
|
if (!is_numeric($daysBetweenIssueAndMaturity)) {
|
|
// return date error
|
|
return $daysBetweenIssueAndMaturity;
|
|
}
|
|
$daysBetweenIssueAndMaturity *= $daysPerYear;
|
|
$daysBetweenSettlementAndMaturity = PHPExcel_Calculation_DateTime::YEARFRAC($settlement, $maturity, $basis);
|
|
if (!is_numeric($daysBetweenSettlementAndMaturity)) {
|
|
// return date error
|
|
return $daysBetweenSettlementAndMaturity;
|
|
}
|
|
$daysBetweenSettlementAndMaturity *= $daysPerYear;
|
|
|
|
return ((1 + (($daysBetweenIssueAndMaturity / $daysPerYear) * $rate) - (($price / 100) + (($daysBetweenIssueAndSettlement / $daysPerYear) * $rate))) /
|
|
(($price / 100) + (($daysBetweenIssueAndSettlement / $daysPerYear) * $rate))) *
|
|
($daysPerYear / $daysBetweenSettlementAndMaturity);
|
|
}
|
|
return PHPExcel_Calculation_Functions::VALUE();
|
|
} // function YIELDMAT()
|
|
|
|
} // class PHPExcel_Calculation_Financial
|