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# scipy.ndimage.measurements.sum

`scipy.ndimage.measurements.``sum`(input, labels=None, index=None)

  Calculate the sum of the values of the array.

  Parameters: | labels : array of integers, same shape as input Assign labels to the values of the array. index : scalar or array A single label number or a sequence of label numbers of the objects to be measured. If index is None, all values are used where ‘labels’ is larger than zero.

  Examples

      >>> input =  [0,1,2,3]
      >>> labels = [1,1,2,2]
      >>> sum(input, labels, index=[1,2])
      [1.0, 5.0]

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