numpy.ma.isarray#

Test whether input is an instance of MaskedArray.

This function returns True if x is an instance of MaskedArray and returns False otherwise. Any object is accepted as input.

Parameters:

xobject: Object to test.

Returns:

resultbool: True if x is a MaskedArray.

See also

isMA: Alias to isMaskedArray.
isarray: Alias to isMaskedArray.

Examples

>>> import numpy as np
>>> import numpy.ma as ma
>>> a = np.eye(3, 3)
>>> a
array([[ 1.,  0.,  0.],
       [ 0.,  1.,  0.],
       [ 0.,  0.,  1.]])
>>> m = ma.masked_values(a, 0)
>>> m
masked_array(
  data=[[1.0, --, --],
        [--, 1.0, --],
        [--, --, 1.0]],
  mask=[[False,  True,  True],
        [ True, False,  True],
        [ True,  True, False]],
  fill_value=0.0)
>>> ma.isMaskedArray(a)
False
>>> ma.isMaskedArray(m)
True
>>> ma.isMaskedArray([0, 1, 2])
False