`numpy.ma.extras:atleast_1d`

Signature

def atleast_1d ( * arys )

Convert inputs to arrays with at least one dimension.

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

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

The function is applied to both the _data and the _mask, if any.

import numpy as np
np.atleast_1d(1.0)

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x = np.arange(9.0).reshape(3,3)
np.atleast_1d(x)
np.atleast_1d(x) is x

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

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