Vector Times Matrix X45739

Statement

Write a function $v\_times\_m(v, m)$ that receives a vector (in the form of a tuple) of floats and a matrix of floats $m$ , and returns the product of the vector by the matrix. The matrix is represented as a tuple of rows, each row being, in turn, a tuple of floats. We are guaranteed that the length of $v$ is not zero and that it equals the lengths of all the columns of $m$ . The returned vector is to be a tuple of the same length as the rows of $m$ , which is also guaranteed to be nonzero.

Observation

Solutions that return other iterable types instead of tuples are vey likely to be accepted as well.

Sample session

>>> v_times_m( (1.5, 2.5),  ((10.5, 20.0, 30.0), (110.0, 120.0, 130.0)) )
(290.75, 330.0, 370.0)
>>> v_times_m( (5.0, 4.0, 3.0, 2.0),  ((1.0, 2.0), (10.0, 15.0), (20.0, 25.0), (30.0, 35.0)) )
(165.0, 215.0)

Information

Author: José Luis Balcázar
Language: English
Official solutions: Python
User solutions: Python