Matrix Infinity Norm

Problem

Compute the induced matrix infinity norm: the maximum over rows of the sum of absolute entries in that row.

||A||_inf = max_i sum_j |A[i][j]|

Hint

Sum across each row, then take the largest row total.

case 1

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

expected: 7

case 2

in: [[[1,2,3],[4,5,6]]]

expected: 15

case 3

in: [[[0,0],[0,0]]]

expected: 0

case 4

in: [[[-1.5,2]]]

expected: 3.5

Starter codePython

def matrix_inf_norm(A):
    # Your code here
    pass

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