numpy.ma.putmask#
- ma.putmask(a, mask, values)[source]#
Changes elements of an array based on conditional and input values.
This is the masked array version of
numpy.putmask
, for details seenumpy.putmask
.See also
Notes
Using a masked array as values will not transform a
ndarray
into aMaskedArray
.Examples
>>> arr = [[1, 2], [3, 4]] >>> mask = [[1, 0], [0, 0]] >>> x = np.ma.array(arr, mask=mask) >>> np.ma.putmask(x, x < 4, 10*x) >>> x masked_array( data=[[--, 20], [30, 4]], mask=[[ True, False], [False, False]], fill_value=999999) >>> x.data array([[10, 20], [30, 4]])