How to order 'n' no of populations in ascending order based on their fitness for a minimization objective in matlab

Question

dhiman banerjee 2019-9-19

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/481179-how-to-order-n-no-of-populations-in-ascending-order-based-on-their-fitness-for-a-minimization-obje

评论： Syed Ahmed 2022-11-24

采纳的回答： thoughtGarden

How to order 'n' no of populations in ascending order based on their fitness for a minimization objective in matlab?

2 个评论
显示无隐藏无

dhiman banerjee 2019-9-20

Thank you for the reply. But this code gives fitness value of te each population in acending order. My problem is - that to reorder each population (i.e rows of the population matrix) as per the fitness value of each population in ascending order (Minimization objective)

Kindly help me in this point.

Syed Ahmed 2022-11-24

Try this i had the same issue as you.

fitnessVector = [106; 100; 120; 104]; % fitness value
popu = [12 11 67 89 56;               % populationn vector
        45 13 77 39 86;
        92 54 67 79 76;
        62 54 65  9 5];
        
[X,I] = sort(fitnessVector); % to get indexes of order
popu = [I,popu];             % add index order as first column 
popu = sortrows(popu,'descend'); % sorts based on the first column of matrix
fitnessVector = X            % fitness values 
fitnessVector = 4×1
   100
   104
   106
   120
popu(:,1) = [];                  % remove first column from population.

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

thoughtGarden 2019-9-19

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/481179-how-to-order-n-no-of-populations-in-ascending-order-based-on-their-fitness-for-a-minimization-obje#answer_392644

编辑：thoughtGarden 2019-9-20

I'm assuming you already have the fitness of each population according to the minimization objective. If this is the case, you will simply obtain the index order from the "sort" function while using the "direction" parameter.

sortedIndex = sort(fitnessVector, [],'ascend');

If you found this answer to be correct, please accept it. Otherwise, please add aditional comments so that it may be improved.