(PECL stats >= 1.0.0)
stats_covariance — Computes the covariance of two data sets
stats_covariance ( array $a , array $b ) : float
Returns the covariance of a and b.
a
The first array
b
The second array
Returns the covariance of a and b, or false on failure.
© 1997–2020 The PHP Documentation Group
Licensed under the Creative Commons Attribution License v3.0 or later.
https://www.php.net/manual/en/function.stats-covariance.php