recarray.compress(condition, axis=None, out=None) Return selected slices of this array along given axis. Refer

ndarray.max(axis=None, out=None) Return the maximum along a given axis. Refer to

recarray.nonzero() Return the indices of the elements that are non-zero. Refer to

matrix.var(axis=None, dtype=None, out=None, ddof=0)

matrix.min(axis=None, out=None)

matrix.H Returns the (complex) conjugate transpose of self. Equivalent to np.transpose(self)

ndarray.__lshift__ x.__lshift__(y) <==> x<<y

ndarray.__hex__() <==> hex(x)

ndarray.dumps() Returns the pickle of the array as a string. pickle.loads or numpy.loads will convert the string back to

dtype.itemsize The element size of this data-type object. For 18 of the 21 types this number is fixed by the data-type