89 lines
2.1 KiB
PHP
89 lines
2.1 KiB
PHP
<?php
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namespace PhpOffice\PhpSpreadsheet\Calculation\Statistical;
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class StandardDeviations
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{
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/**
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* STDEV.
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*
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* Estimates standard deviation based on a sample. The standard deviation is a measure of how
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* widely values are dispersed from the average value (the mean).
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*
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* Excel Function:
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* STDEV(value1[,value2[, ...]])
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*
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* @param mixed ...$args Data values
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*
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* @return float|string The result, or a string containing an error
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*/
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public static function STDEV(mixed ...$args)
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{
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$result = Variances::VAR(...$args);
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if (!is_numeric($result)) {
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return $result;
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}
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return sqrt((float) $result);
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}
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/**
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* STDEVA.
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*
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* Estimates standard deviation based on a sample, including numbers, text, and logical values
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*
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* Excel Function:
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* STDEVA(value1[,value2[, ...]])
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*
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* @param mixed ...$args Data values
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*/
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public static function STDEVA(mixed ...$args): float|string
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{
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$result = Variances::VARA(...$args);
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if (!is_numeric($result)) {
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return $result;
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}
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return sqrt((float) $result);
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}
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/**
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* STDEVP.
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*
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* Calculates standard deviation based on the entire population
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*
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* Excel Function:
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* STDEVP(value1[,value2[, ...]])
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*
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* @param mixed ...$args Data values
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*/
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public static function STDEVP(mixed ...$args): float|string
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{
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$result = Variances::VARP(...$args);
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if (!is_numeric($result)) {
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return $result;
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}
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return sqrt((float) $result);
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}
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/**
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* STDEVPA.
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*
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* Calculates standard deviation based on the entire population, including numbers, text, and logical values
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*
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* Excel Function:
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* STDEVPA(value1[,value2[, ...]])
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*
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* @param mixed ...$args Data values
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*/
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public static function STDEVPA(mixed ...$args): float|string
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{
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$result = Variances::VARPA(...$args);
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if (!is_numeric($result)) {
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return $result;
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}
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return sqrt((float) $result);
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}
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}
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