matmul2d¶
Multiplication for 2D matrices.
Parameters¶
-
A
-
B
Examples¶
>>> import pprint
>>> from river import utils
>>> A = {
... (0, 0): 2, (0, 1): 0, (0, 2): 4,
... (1, 0): 5, (1, 1): 6, (1, 2): 0
... }
>>> B = {
... (0, 0): 1, (0, 1): 1, (0, 2): 0, (0, 3): 0,
... (1, 0): 2, (1, 1): 0, (1, 2): 1, (1, 3): 3,
... (2, 0): 4, (2, 1): 0, (2, 2): 0, (2, 3): 0
... }
>>> C = matmul2d(A, B)
>>> pprint.pprint(C)
{(0, 0): 18.0,
(0, 1): 2.0,
(0, 2): 0.0,
(0, 3): 0.0,
(1, 0): 17.0,
(1, 1): 5.0,
(1, 2): 6.0,
(1, 3): 18.0}