trader_stddev
(PECL trader >= 0.2.0)
trader_stddev — Standard Deviation
Description
trader_stddev(array
$real, int $timePeriod = ?, float $nbDev = ?): array
Parameters
-
real -
Array of real values.
-
timePeriod -
Number of period. Valid range from 2 to 100000.
-
nbDev -
Return Values
Returns an array with calculated data or false on failure.
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