`numpy.matrixlib.defmatrix:matrix.prod`

Signature

def prod(self, axis = None, dtype = None, out = None)

Return the product of the array elements over the given axis.

Refer to prod for full documentation.

Same as ndarray.prod, except, where that returns an ndarray, this returns a matrix object instead.

x = np.matrix(np.arange(12).reshape((3,4))); x

✓

matrix([[ 0,  1,  2,  3],
        [ 4,  5,  6,  7],
        [ 8,  9, 10, 11]])

x.prod()

✗

np.int64(0)

x.prod(0)
x.prod(1)

✓

matrix([[   0],
        [ 840],
        [7920]])