numpy.ma.make_mask_descr(ndtype)

numpy.ma.common_fill_value(a, b)

numpy.ma.size(obj, axis=None)

numpy.ma.masked_less_equal(x, value, copy=True)

MaskedArray.flatten(order='C')

numpy.ma.masked_less(x, value, copy=True)

numpy.ma.make_mask(m, copy=False, shrink=True, dtype=)

numpy.ma.diag(v, k=0)

numpy.ma.getmask(a)

MaskedArray.ptp(axis=None, out=None, fill_value=None)