intersect1d

intersect1d(*arrays: Any, assume_unique: bool = False, xp: ModuleType | None = None) → Any

SciPy-specific replacement for np.intersect1d with assume_unique and

xp.

Parameters:

• *arrays (array_like) – Input arrays. Will be cast to a common type.

• assume_unique (bool, optional) –

  If True, the input arrays are assumed to be unique, which can speed up

  the calculation.

• xp (array_namespace, optional) –

  The array API namespace to use. If not provided, the namespace is

  inferred from the arrays.

Returns:

intersect1d – Sorted 1D array of common elements.

Return type:

array

Notes

This function is a thin wrapper around setdiff1d from array_api_extra.

Examples

>>> import numpy as np
>>> x = np.array([1, 2, 3, 4, 5])
>>> y = np.array([3, 4, 5, 6, 7])
>>> intersect1d(x, y)
array([3, 4, 5])
>>> z = np.array([3, 4, 7, 8])
>>> intersect1d(x, y, z)
array([3, 4])