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.