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trader_stddev

(PECL trader >= 0.2.0)

Standard Deviation

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

Parameters:

real

Array of real values.

timePeriod

Number of period. Valid range from 2 to 100000.

nbDev

Number of period. Valid range from 2 to 100000.

Returns:

Returns an array with calculated data or false on failure.

Links:

http://php.net/manual/en/function.trader-stddev.php

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2016-02-24 16:02:55

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