Polynomial Feature Value

Problem

Build the polynomial feature vector [1, x, x^2, ..., x^degree] for a scalar input.

Hint

The constant 1 feature lets the linear weights carry a bias.

case 1

in: [2,3]

expected: [1,2,4,8]

case 2

in: [0.5,2]

expected: [1,0.5,0.25]

case 3

in: [-1,1]

expected: [1,-1]

case 4

in: [3,0]

expected: [1]

Starter codePython

def polynomial_features(x, degree):
    # Your code here
    pass

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