trader_stddev

(PECL trader >= 0.2.0)

trader_stddev — Standard Deviation

説明

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

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.