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Showing content from http://docs.scipy.org/doc/numpy/reference/generated/numpy.ma.MaskedArray.compressed.html below:

numpy.ma.MaskedArray.compressed — NumPy v2.3 Manual

method

ma.MaskedArray.compressed()[source]#

Return all the non-masked data as a 1-D array.

Returns:

datandarray

A new ndarray holding the non-masked data is returned.

Notes

The result is not a MaskedArray!

Examples

>>> import numpy as np
>>> x = np.ma.array(np.arange(5), mask=[0]*2 + [1]*3)
>>> x.compressed()
array([0, 1])
>>> type(x.compressed())
<class 'numpy.ndarray'>

N-D arrays are compressed to 1-D.

>>> arr = [[1, 2], [3, 4]]
>>> mask = [[1, 0], [0, 1]]
>>> x = np.ma.array(arr, mask=mask)
>>> x.compressed()
array([2, 3])

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