Return the data part of the masked array.
DEPRECATED: You should really use .data instead.
Examples
>>> x = np.ma.array([1, 2, 3], mask=[False, True, False])
>>> x
masked_array(data = [1 -- 3],
mask = [False True False],
fill_value = 999999)
>>> x.data
array([1, 2, 3])