numpy.ma.MaskedArray.compressed — NumPy v2.3 Manual (original) (raw)

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])