real coded genetic algorithm

i have found the objective function.i don't know how to use objective fun in real coded genetic algo in matlab code (or) in matlab toolbox

5 个评论

vetri - is your objective function is the function that you wish to minimize (and so will be the fitness function of the GA)?
no.i have to maximize the objective function
Ok, so you will have to change (slightly) your objective function so that the problem becomes a minimization one. If you are going to use the genetic algorithm functionality from the Global Optimization Toolbox, you will be using ga and so the signature of your objective/fitness function will be such that it should accept a row vector of length nvars and return a scalar value. So something like
function [result] = myFitnessFunc(inputVars)
where inputVars is a 1xnvars array (with nvars being the number of variables) and * result* is the scalar result. Those solutions that produce smaller results will be considered "more fit" and so more likely chosen for selection as parents to the next generation/iteration of the algorithm.
how to change objective function..but in my project the objective fun should be maximized.
can i see your program code ?

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回答(1 个)

Alan Weiss
Alan Weiss 2014-9-29

0 个投票

The documentation shows how to maximize instead of minimize. Basically, just take the negative of your objective function.
Alan Weiss
MATLAB mathematical toolbox documentation

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2014-9-26

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