EasyCalculusca-317

Sum of Squares Gradient Vector

Problem

For f(w) = sum_i (w_i - t_i)^2, the gradient is 2 * (w_i - t_i) for each coordinate.

Given the parameter vector w and target vector t, return the gradient list.

Hint

Differentiate each squared residual independently.

case 1

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

expected: [2,4]

case 2

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

expected: [0,0]

case 3

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

expected: [-2,4,-6]

Starter codePython

def sum_of_squares_gradient_vector(w, t):
    # Your code here
    pass

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