stats_covariance

(PECL stats >= 1.0.0)

stats_covariance — Computes the covariance of two data sets

说明

stats_covariance ( array $a , array $b ) : float

Returns the covariance of a and b.

参数

a

The first array

b

The second array

返回值

Returns the covariance of a and b, or FALSE on failure.

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