numpy.atleast_1d — NumPy v2.2 Manual (original) (raw)

numpy.atleast_1d(*arys)[source]#

Convert inputs to arrays with at least one dimension.

Scalar inputs are converted to 1-dimensional arrays, whilst higher-dimensional inputs are preserved.

Parameters:

arys1, arys2, …array_like

One or more input arrays.

Returns:

retndarray

An array, or tuple of arrays, each with a.ndim >= 1. Copies are made only if necessary.

Examples

import numpy as np np.atleast_1d(1.0) array([1.])

x = np.arange(9.0).reshape(3,3) np.atleast_1d(x) array([[0., 1., 2.], [3., 4., 5.], [6., 7., 8.]]) np.atleast_1d(x) is x True

np.atleast_1d(1, [3, 4]) (array([1]), array([3, 4]))