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numpy.ma.argmax
numpy.ma.argmax(self, axis=None, fill_value=None, out=None) = <numpy.ma.core._frommethod object>- 
    
Returns array of indices of the maximum values along the given axis. Masked values are treated as if they had the value fill_value.
Parameters: - 
           
axis : {None, integer} - 
           
If None, the index is into the flattened array, otherwise along the specified axis
 - 
           
fill_value : {var}, optional - 
           
Value used to fill in the masked values. If None, the output of maximum_fill_value(self._data) is used instead.
 - 
           
out : {None, array}, optional - 
           
Array into which the result can be placed. Its type is preserved and it must be of the right shape to hold the output.
 
Returns: - 
           
index_array : {integer_array} 
Examples
>>> a = np.arange(6).reshape(2,3) >>> a.argmax() 5 >>> a.argmax(0) array([1, 1, 1]) >>> a.argmax(1) array([2, 2]) - 
           
 
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 https://docs.scipy.org/doc/numpy-1.16.1/reference/generated/numpy.ma.argmax.html