Calculates the geometric mean of the values in the passed array.
That is: n-th root of (x1 * x2 * ... * xn)
Parameters: | a : array of positive values axis : int or None zero_sub : value to substitute for zero values. Default is 0. |
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Returns: | The geometric mean computed over a single dimension of the input array or : all values in the array if axis==None. : |