trader_stddev
(PECL trader >= 0.2.0)
trader_stddev — Standard Deviation
Descrição
array trader_stddev
( array
$real
[, integer $timePeriod
[, float $nbDev
]] )
Parâmetros
-
real -
Array of real values.
-
timePeriod -
Number of period. Valid range from 2 to 100000.
-
nbDev -
Valor Retornado
Returns an array with calculated data or false on failure.