Normalize Matrix Rows

Problem

Normalize every row of matrix A to unit L2 length.

If a row is the zero vector, leave it as zeros. Return a list of rows of floats.

Hint

Treat each row as an independent vector and reuse the L2 norm formula.

case 1

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

expected: [[0.6,0.8],[0,0]]

case 2

in: [[[1,0],[0,1]]]

expected: [[1,0],[0,1]]

case 3

in: [[[1,1]]]

expected: [[0.7071067811865475,0.7071067811865475]]

case 4

in: [[[0,0],[5,0]]]

expected: [[0,0],[1,0]]

Starter codePython

def normalize_rows(A):
    # Your code here
    pass

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