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replace_chromosome.m
Package: m.rar [view]
Upload User: hjzhipin
Upload Date: 2020-09-23
Package Size: 376k
Code Size: 3k
Category:
Compress-Decompress algrithms
Development Platform:
Others
- function f = replace_chromosome(intermediate_chromosome,pro,pop)
- %% replace_chromosome(intermediate_chromosome,pro,pop)
- % This function replaces the chromosomes based on rank and crowding
- % distance. Initially until the population size is reached each front is
- % added one by one until addition of a complete front which results in
- % exceeding the population size. At this point the chromosomes in that
- % front is added subsequently to the population based on crowding distance.
- % % Copyright (C) 2009 Aravind Seshadri % % This program is free software: you can redistribute it and/or modify % it under the terms of the GNU General Public License as published by % the Free Software Foundation, either version 3 of the License, or % (at your option) any later version. % % This program is distributed in the hope that it will be useful, % but WITHOUT ANY WARRANTY; without even the implied warranty of % MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the % GNU General Public License for more details. % % You should have received a copy of the GNU General Public License % along with this program. If not, see <http://www.gnu.org/licenses/>.
- [N,V] = size(intermediate_chromosome);
- switch pro
- case 1
- M = 2;
- V = 6;
- case 2
- M = 3;
- V = 12;
- end
- % Get the index for the population sort based on the rank
- [temp,index] = sort(intermediate_chromosome(:,M + V + 1));
- % Now sort the individuals based on the index
- for i = 1 : N
- sorted_chromosome(i,:) = intermediate_chromosome(index(i),:);
- end
- % Find the maximum rank in the current population
- max_rank = max(intermediate_chromosome(:,M + V + 1));
- % Start adding each front based on rank and crowing distance until the
- % whole population is filled.
- previous_index = 0;
- for i = 1 : max_rank
- current_index = max(find(sorted_chromosome(:,M + V + 1) == i));
- if current_index > pop
- remaining = pop - previous_index;
- temp_pop = ...
- sorted_chromosome(previous_index + 1 : current_index, :);
- [temp_sort,temp_sort_index] = ...
- sort(temp_pop(:, M + V + 2),'descend');
- for j = 1 : remaining
- f(previous_index + j,:) = temp_pop(temp_sort_index(j),:);
- end
- return;
- elseif current_index < pop
- f(previous_index + 1 : current_index, :) = ...
- sorted_chromosome(previous_index + 1 : current_index, :);
- else
- f(previous_index + 1 : current_index, :) = ...
- sorted_chromosome(previous_index + 1 : current_index, :);
- return;
- end
- previous_index = current_index;
- end