stats_variance
(PECL stats >= 1.0.0)
stats_variance — Returns the variance
Описание
stats_variance
( array
$a
, bool $sample = false
) : float
Returns the variance of the values in a.
Список параметров
-
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
arepresents a sample of the population; defaults tofalse.
Возвращаемые значения
Returns the variance on success; false on failure.