Unit Vector Check

Problem

Check whether a vector has unit length.

Return True when the squared norm is within 1e-9 of 1. The zero vector and any non-unit vector return False.

Hint

Compare the squared norm to 1; this avoids computing a square root.

case 1

in: [[1,0,0]]

expected: true

case 2

in: [[0.6,0.8]]

expected: true

case 3

in: [[0,0]]

expected: false

case 4

in: [[1,1]]

expected: false

case 5

in: [[0.6,0.8000000001]]

expected: true

Starter codePython

def unit_vector_check(v):
    # Your code here
    pass

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