Genetic Algorithm forming a Fitness Function

3 views (last 30 days)
Hi.. i am new to Optimization Problems and specifically Genetic Algorithm.. I have read through all the given literature and have tried some simple practice functions which now seem too simple and straight forward..
My current task is to model a optimization problem with a Fitness Function which has a couple of summations within it. Is there an alternative to write the function without using long for loops? I have attached an example within.
Or where else can i look on guides to write such Fitness Functions?
This is still practice for me to get started on my work ahead.. your help will be much appreciated.
  1 Comment
gagandeep khajuria
gagandeep khajuria on 21 Apr 2016
could u tell me the procedure of writing , say five equations of five variables but each equation has its own value(means it can't be taken as any variable) for GA toolbox... will be waiting for ur kind rplyy...thanking u

Sign in to comment.

Accepted Answer

Matt J
Matt J on 5 Jan 2014
Edited: Matt J on 5 Jan 2014
I'm assuming the unknowns are X(k,i,t).
Weighted summations are just matrix-vector multiplications or dot products, which MATLAB is good at, once you've built the relevant matrices. For example, the first summation term you've shown is dot(Q(:), X(:)) where
[D,I,T]=size(X);
Q=kron(P(1,1:D), tril(ones(I,T),-1));
I wonder, though, whether GA is the appropriate tool here. Since the whole objective function is linear in X, you should probably be using LINPROG, unless you have weird constraints that you haven't mentioned.
  9 Comments
Joseph Petinrin
Joseph Petinrin on 4 Mar 2014
Pls can you assist in writing the function code so as to use it in GA optimization Toolbox. Tnx.
Joseph
Joseph Petinrin
Joseph Petinrin on 4 Mar 2014
I am having similar problem. That is sum*sum from i=1 to 24. but I need assistance on how to write the function code. That is,
function y=objective_function(x) Y=........; end
Pls, can anyone assist in writing this code. So I can apply it in solving my problem which is similar to above.
Tnx. Joseph

Sign in to comment.

More Answers (0)

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!