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ORETD-402 1. Random sampling: This method generates random population members: python import random def random_sample(input_array, n_target=10): return random.sample(input_array, n_target) scala> random_sample(Array(1,2,3,4), 2) res1: Array[1, 3] scala> random_sample(Array(1,2,3,4), 2) res2: Array[1, 4) 2. Tournament selection: This method selects a random tournament of members, and then selects the best to compete as parent: python import random def tournament_selection(*cmp, population, n_competitors, n_winner=1): return [max(*cp, population, a.choice for i in range(n_competitors)) for i in n_winner) scala> tournament_selection(Array(1,2,3,4), 2, 2) res1: Array[1, 3) scala> tournament_selection(Array(1,2,3,4), 2, 2) res2: Array[1, 3) scala> tournament_selection(Array(1,2,3,4), 2, 2) res3: Array[1, 3) scala> tournament_selection(Array(1,2,3,4), 2, 2) res4: Array[1, 1) scala> tournament_selection(Array(1,2,3,4), 2, 2) re5: Array[1, 3) scala> tournament_selection(Array(1,2,3,4), 2, 2) res6: Array[1, 3) scala> tournament_selection(Array(1,2,3,4), 2, 2) res7: Array(1, 3) scala> tournament_selection(Array(1,2,3,4), 2, 2) res8: Array[1, 3) scala> tournament_selection(Packcase, 2, 2) res9: Array[1, 3) scala> tournament_selection(Array(1,2,3,4), 2, 2) res10: Array[1, 3)< 3. Random proportional selection: This method generates a chance for each member, and accordingly selects them: python import random def rp_selection(population, sum_value, n_target=10): cdf = itertools.__index_of(n_population, sum_value) return [bm for choice in population[0, len(population)] value = cdf / cdf' value <cdf / cdf' value <cdf / cdf' value <cdf / cdf' value <cdf / cdf' value <cdf / cdf' value <cdf / cdf' value <cdf / cdf' value <cdf / cdf' value <cdf / cdf' value <cdf / cdf' value <cdf / cdf' value <cdf / cdf' value <cdf / cdf' value <cdf / cdf' value <cdf / cdf' value <cdf / cdf' value <cdf / cdf' value <cdf / cdf' value <cdf / cdf' value <cdf / cdf' value <cdf / cdf' value <cdf / cdf' value <cdf / cdf' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <c <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd�value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd' value <cdf / cfd’ val }

2018年12月26日53 分钟