stats_variance
(PECL stats >= 1.0.0)
stats_variance — Returns the variance
パラメータ
a
-
The array of data to find the standard deviation for. Note that all
values of the array will be cast to float.
sample
-
Indicates if a
represents a sample of the
population; defaults to false
.
戻り値
Returns the variance on success; false
on failure.