bundles / scipy latest / scipy / ndimage / _measurements / sum_labels

function

`scipy.ndimage._measurements:sum_labels`

source: build-install/usr/lib/python3.14/site-packages/scipy/ndimage/_measurements.py:715

Signature

def sum_labels(input, labels = None, index = None)

Summary

Calculate the sum of the values of the array.

Parameters

input : array_like: Values of input inside the regions defined by labels are summed together.
labels : array_like of ints, optional: Assign labels to the values of the array. Has to have the same shape as input.
index : array_like, optional: A single label number or a sequence of label numbers of the objects to be measured.

Returns

sum : ndarray 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_labels(input, labels, index=[1,2])
ndimage.sum_labels(input, labels, index=1)
ndimage.sum_labels(input, labels)

✗

np.int64(6)

See also

mean
median

Aliases

scipy.ndimage.sum_labels