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bundles / numpy latest / numpy / flatnonzero

_ArrayFunctionDispatcher

numpy:flatnonzero

source: /dev/numpy/build-install/usr/lib/python3.14/site-packages/numpy/_core/numeric.py :679

Signature

def   flatnonzero ( a )

Summary

Return indices that are non-zero in the flattened version of a.

Extended Summary

This is equivalent to np.nonzero(np.ravel(a))[0].

Parameters

a : array_like

Input data.

Returns

res : ndarray

Output array, containing the indices of the elements of a.ravel() that are non-zero.

Examples

import numpy as np
x = np.arange(-2, 3)
x
np.flatnonzero(x)
✓
Use the indices of the non-zero elements as an index array to extract these elements: 
x.ravel()[np.flatnonzero(x)]
✓

See also

nonzero

Return the indices of the non-zero elements of the input array.

ravel

Return a 1-D array containing the elements of the input array.

Aliases

  • numpy.flatnonzero