Document

argwhere(a)

Notes

np.argwhere(a) is almost the same as np.transpose(np.nonzero(a)) , but produces a result of the correct shape for a 0D array.

The output of argwhere is not suitable for indexing arrays. For this purpose use nonzero(a) instead.

Parameters

a : array_like: Input data.

Returns

index_array : (N, a.ndim) ndarray: Indices of elements that are non-zero. Indices are grouped by element. This array will have shape (N, a.ndim) where N is the number of non-zero items.

Find the indices of array elements that are non-zero, grouped by element.

Examples

>>> x = np.arange(6).reshape(2,3)
... x
array([[0, 1, 2],
       [3, 4, 5]])

>>> np.argwhere(x>1)
array([[0, 2],
       [1, 0],
       [1, 1],
       [1, 2]])

See :

Back References

The following pages refer to to this document either explicitly or contain code examples using this.

numpy.nonzero dask.array.routines.argwhere

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