numpy.ma.is_masked(x)

numpy.ma.any(self, axis=None, out=None) = Check if any of the elements of a are true. Performs a logical_or over

MaskedArray.mean(axis=None, dtype=None, out=None)

MaskedArray.compressed()

numpy.ma.ptp(obj, axis=None, out=None, fill_value=None)

numpy.ma.shape(obj)

MaskedArray.harden_mask()

numpy.ma.argsort(a, axis=None, kind='quicksort', order=None, fill_value=None)

MaskedArray.mask Mask

MaskedArray.get_fill_value()