Trader 関数
PHP Manual

trader_stddev

(PECL trader >= 0.2.0)

trader_stddevStandard Deviation

説明

array trader_stddev ( array $real [, integer $timePeriod [, float $nbDev ]] )

パラメータ

real

実数値の配列

timePeriod

Number of period. Valid range from 2 to 100000.

nbDev

返り値

Returns an array with calculated data or false on failure.


Trader 関数
PHP Manual