bundles / numpy 2.4.3 / numpy / setdiff1d

_ArrayFunctionDispatcher

`numpy:setdiff1d`

source: /numpy/lib/_arraysetops_impl.py :1120

Signature

def setdiff1d ( ar1 , ar2 , assume_unique = False )

Summary

Find the set difference of two arrays.

Extended Summary

Return the unique values in ar1 that are not in ar2.

Parameters

ar1 : array_like: Input array.
ar2 : array_like: Input comparison array.
assume_unique : bool: If True, the input arrays are both assumed to be unique, which can speed up the calculation. Default is False.

Returns

setdiff1d : ndarray: 1D array of values in ar1 that are not in ar2. The result is sorted when assume_unique=False, but otherwise only sorted if the input is sorted.

Examples

import numpy as np
a = np.array([1, 2, 3, 2, 4, 1])
b = np.array([3, 4, 5, 6])
np.setdiff1d(a, b)

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Aliases

numpy.setdiff1d