trader_stddev
(PECL trader >= 0.2.0)
trader_stddev — Standard 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.