<?php
error_reporting(E_ALL);
set_time_limit(0);
date_default_timezone_set('Europe/London');
?>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>PhpSpreadsheet Calculation Examples</title>
</head>
<body>
<h1>DSTDEV</h1>
<h2>Estimates the standard deviation based on a sample of selected database entries.</h2>
<?php
/** Include path **/
set_include_path(get_include_path() . PATH_SEPARATOR . '../../../../Classes/');
/** Include PhpSpreadsheet */
include 'PHPExcel.php';
// Create new PhpSpreadsheet object
$spreadsheet = new PHPExcel();
$worksheet = $spreadsheet->getActiveSheet();
// Add some data
$database = [['Tree', 'Height', 'Age', 'Yield', 'Profit'],
['Apple', 18, 20, 14, 105.00],
['Pear', 12, 12, 10, 96.00],
['Cherry', 13, 14, 9, 105.00],
['Apple', 14, 15, 10, 75.00],
['Pear', 9, 8, 8, 76.80],
['Apple', 8, 9, 6, 45.00],
];
$criteria = [['Tree', 'Height', 'Age', 'Yield', 'Profit', 'Height'],
['="=Apple"', '>10', null, null, null, '<16'],
['="=Pear"', null, null, null, null, null],
];
$worksheet->fromArray($criteria, null, 'A1');
$worksheet->fromArray($database, null, 'A4');
$worksheet->setCellValue('A12', 'The estimated standard deviation in the yield of Apple and Pear trees');
$worksheet->setCellValue('B12', '=DSTDEV(A4:E10,"Yield",A1:A3)');
$worksheet->setCellValue('A13', 'The estimated standard deviation in height of Apple and Pear trees');
$worksheet->setCellValue('B13', '=DSTDEV(A4:E10,2,A1:A3)');
echo '<hr />';
echo '<h4>Database</h4>';
$databaseData = $worksheet->rangeToArray('A4:E10', null, true, true, true);
var_dump($databaseData);
echo '<hr />';
// Test the formulae
echo '<h4>Criteria</h4>';
$criteriaData = $worksheet->rangeToArray('A1:A3', null, true, true, true);
var_dump($criteriaData);
echo $worksheet->getCell('A12')->getValue() . '<br />';
echo 'DSTDEV() Result is ' . $worksheet->getCell('B12')->getCalculatedValue() . '<br /><br />';
echo '<h4>Criteria</h4>';
$criteriaData = $worksheet->rangeToArray('A1:A3', null, true, true, true);
var_dump($criteriaData);
echo $worksheet->getCell('A13')->getValue() . '<br />';
echo 'DSTDEV() Result is ' . $worksheet->getCell('B13')->getCalculatedValue();
?>
<body>
</html>