Return all the non-masked data as a 1-D array.
Returns : | data : ndarray
|
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Notes
The result is not a MaskedArray!
Examples
>>> x = np.ma.array(np.arange(5), mask=[0]*2 + [1]*3)
>>> x.compressed()
array([0, 1])
>>> type(x.compressed())
<type 'numpy.ndarray'>