Laplace PDF

Problem

Laplace (double exponential) probability density with location mu and scale b:

f(x) = exp(-|x - mu| / b) / (2 * b).

Return 0.0 for b <= 0.

Hint

The density is symmetric around mu and decays exponentially.

case 1

in: [0,1,0]

expected: 0.5

case 2

in: [0,1,1]

expected: 0.18393972058572117

case 3

in: [1,2,1]

expected: 0.25

case 4

in: [0,-1,0]

expected: 0

Starter codePython

import math


def laplace_pdf(mu, b, x):
    # Your code here
    pass

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