numpy.ma.append

numpy.ma.append(a, b, axis=None) [source]

Append values to the end of an array.

New in version 1.9.0.

Parameters

aarray_like

Values are appended to a copy of this array.

barray_like

These values are appended to a copy of a. It must be of the correct shape (the same shape as a, excluding axis). If axis is not specified, b can be any shape and will be flattened before use.

axisint, optional

The axis along which v are appended. If axis is not given, both a and b are flattened before use.

Returns

appendMaskedArray

A copy of a with b appended to axis. Note that append does not occur in-place: a new array is allocated and filled. If axis is None, the result is a flattened array.

See also

numpy.append

Equivalent function in the top-level NumPy module.

Examples

>>> import numpy.ma as ma
>>> a = ma.masked_values([1, 2, 3], 2)
>>> b = ma.masked_values([[4, 5, 6], [7, 8, 9]], 7)
>>> ma.append(a, b)
masked_array(data=[1, --, 3, 4, 5, 6, --, 8, 9],
             mask=[False,  True, False, False, False, False,  True, False,
                   False],
       fill_value=999999)