Skip to main content
`Ctrl`+`K`

# numpy.ma.union1d

ma.union1d(ar1, ar2)

  Union of two arrays.

  The output is always a masked array. See `numpy.union1d` for more details.

  See also

  `numpy.union1d`

    Equivalent function for ndarrays.

  Examples

      >>> import numpy as np
      >>> ar1 = np.ma.array([1, 2, 3, 4])
      >>> ar2 = np.ma.array([3, 4, 5, 6])
      >>> np.ma.union1d(ar1, ar2)
      masked_array(data=[1, 2, 3, 4, 5, 6],
               mask=False,
         fill_value=999999)