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stats_harmonic_mean

(PECL stats >= 1.0.0)

stats_harmonic_mean — Returns the harmonic mean of an array of values

说明

stats_harmonic_mean(array $a): number

Returns the harmonic mean of the values in a.

参数

a: The input array

返回值

Returns the harmonic mean of the values in a, or false if a is empty or is not an array.