stats_covariance
(PECL stats >= 1.0.0)
stats_covariance — Computes the covariance of two data sets
Description
stats_covariance ( array $a , array $b ) : float
Returns the covariance of a and b.
Parameters
-
a -
The first array
-
b -
The second array
Return Values
Returns the covariance of a and b, or false on failure.
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https://www.php.net/manual/en/function.stats-covariance.php