scipy.ndimage.sum_labels#
- scipy.ndimage.sum_labels(input, labels=None, index=None)[source]#
Calculate the sum of the values of the array.
- Parameters
- inputarray_like
Values of input inside the regions defined by labels are summed together.
- labelsarray_like of ints, optional
Assign labels to the values of the array. Has to have the same shape as input.
- indexarray_like, optional
A single label number or a sequence of label numbers of the objects to be measured.
- Returns
- sumndarray or scalar
An array of the sums of values of input inside the regions defined by labels with the same shape as index. If ‘index’ is None or scalar, a scalar is returned.
Examples
>>> from scipy import ndimage >>> input = [0,1,2,3] >>> labels = [1,1,2,2] >>> ndimage.sum(input, labels, index=[1,2]) [1.0, 5.0] >>> ndimage.sum(input, labels, index=1) 1 >>> ndimage.sum(input, labels) 6