Residual Vector

Problem

Compute the residual vector r = b - A*x for a matrix A and vectors x and b with matching dimensions.

Return the residual as a list.

Hint

The residual is zero exactly when A*x equals b.

case 1

in: [[[1,1],[1,2],[1,3]],[0,1],[1,2,3]]

expected: [0,0,0]

case 2

in: [[[1,0],[0,1]],[3,-4],[1,1]]

expected: [-2,5]

case 3

in: [[[2,0],[0,3]],[1,1],[4,4]]

expected: [2,1]

case 4

in: [[[1,1],[1,1]],[2,3],[5,5]]

expected: [0,0]

Starter codePython

def residual_vector(A, x, b):
    # Your code here
    pass

4 test cases · run your code against them in the editor