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PATH: home / lab2454c / aficb.com / vendor / phpoffice / phpspreadsheet / src / PhpSpreadsheet / Calculation / Statistical

<?php

namespace PhpOffice\PhpSpreadsheet\Calculation\Statistical;

use PhpOffice\PhpSpreadsheet\Calculation\ArrayEnabled;
use PhpOffice\PhpSpreadsheet\Calculation\Exception;
use PhpOffice\PhpSpreadsheet\Calculation\Functions;

class Standardize extends StatisticalValidations
{
    use ArrayEnabled;

/**
     * STANDARDIZE.
     *
     * Returns a normalized value from a distribution characterized by mean and standard_dev.
     *
     * @param array|float $value Value to normalize
     *                      Or can be an array of values
     * @param array|float $mean Mean Value
     *                      Or can be an array of values
     * @param array|float $stdDev Standard Deviation
     *                      Or can be an array of values
     *
     * @return array|float|string Standardized value, or a string containing an error
     *         If an array of numbers is passed as an argument, then the returned result will also be an array
     *            with the same dimensions
     */
    public static function execute($value, $mean, $stdDev)
    {
        if (is_array($value) || is_array($mean) || is_array($stdDev)) {
            return self::evaluateArrayArguments([self::class, __FUNCTION__], $value, $mean, $stdDev);
        }

try {
            $value = self::validateFloat($value);
            $mean = self::validateFloat($mean);
            $stdDev = self::validateFloat($stdDev);
        } catch (Exception $e) {
            return $e->getMessage();
        }

if ($stdDev <= 0) {
            return Functions::NAN();
        }

return ($value - $mean) / $stdDev;
    }
}

[+] Distributions
[-] Averages.php [edit]
[-] MaxMinBase.php [edit]
[-] StandardDeviations.php [edit]
[-] Minimum.php [edit]
[-] Conditional.php [edit]
[+] ..
[-] Size.php [edit]
[-] Deviations.php [edit]
[-] Trends.php [edit]
[-] Percentiles.php [edit]
[-] AggregateBase.php [edit]
[-] Standardize.php [edit]
[-] Maximum.php [edit]
[+] Averages
[-] Confidence.php [edit]
[-] StatisticalValidations.php [edit]
[-] Permutations.php [edit]
[-] Variances.php [edit]
[-] Counts.php [edit]
[-] VarianceBase.php [edit]