MaskedArray.copy(order='C')

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

numpy.ma.mean(self, axis=None, dtype=None, out=None) = Returns the average of the array elements. Masked entries are ignored

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

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

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

numpy.ma.atleast_2d(*arys) = View inputs as arrays with at least two dimensions.

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

numpy.ma.mask_rowcols(a, axis=None)

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