# stats_stat_innerproduct

(PECL stats >= 1.0.0)

stats_stat_innerproduct — Returns the inner product of two vectors

### 说明

stats_stat_innerproduct(array `$arr1`, array `$arr2`): float

Returns the inner product of `arr1` and `arr2`.

### 参数

`arr1`

  The first array

`arr2`

  The second array

### 返回值

Returns the inner product of `arr1` and `arr2`, or `false` on failure.

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