DE Mutant Vector

Problem

Build a differential evolution mutant vector for individual i.

After random.seed(seed), sample three distinct indices a, b, c from all indices except i using random.sample, then return population[a] + f * (population[b] - population[c]) elementwise.

Hint

Indices a, b, and c must be distinct and different from i.

Test cases

case 1

in: [[[1,2],[3,4],[5,6],[7,8]],0,0.5,0]

expected: [7,8]

case 2

in: [[[0],[1],[2],[3]],2,0.8,42]

expected: [2.2]

case 3

in: [[[1,0],[0,1],[2,2],[-1,-1]],3,0.3,7]

expected: [-0.3,0.4]

Starter codePython

def de_mutant_vector(population, i, f, seed):
    # Your code here
    pass

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