numpy.ma.copy(self, *args, **params) a.copy(order='C') = Return a copy of the array.

numpy.ma.append(a, b, axis=None)

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

numpy.zeros(shape, dtype=float, order='C') Return a new array of given shape and type, filled with zeros.

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

Arrayterator.shape The shape of the array to be iterated over. For an example, see

numpy.iscomplex(x)

chararray.ndim Number of array dimensions. Examples

chararray.data Python buffer object pointing to the start of the array?s data.

MaskedArray.nonzero()