dotvecmat

Vector times matrix from left side, i.e. transpose(x)A.

Parameters

• x

• A

Examples

>>> from river import utils

>>> x = {0: 4, 1: 5}

>>> A = {
...     (0, 0): 0, (0, 1): 1,
...     (1, 0): 2, (1, 1): 3
... }

>>> C = utils.math.dotvecmat(x, A)
>>> print(C)
{0: 10.0, 1: 19.0}