Genetic Algorithm fitness value chart

Hi I am using genetic algorithm for a mixed integer linear programming. I used this command to show genetic algorithm "fitness value" chart:

x=ga(problem); problem.options.PlotFcns = @gaplotbestf;

But matlab gives me "penalty value" chart! Also I want to adjust generation value as 200 but I don't know how can I do that!

Can anyone help me?

Answer 1

[Alan Weiss]

Your problem probably has integer constraints. Maybe nonlinear constraints, too. The solver behaves very differently with tose kinds of constraints. See Mixed Integer Optimization and Nonlinear Constraint Solver Algorithms.

For more help, please shw us your option settings and ga call, and tell us what you want to accomplish (setting a generation value to 200 is not what you want to accomplish; you might want to solve a problem to a certain accuracy, or in a certain time, but I find it hard to believe that setting a generation value of 200 is really the goal).

Alan Weiss

MATLAB mathematical toolbox documentation

[S AsZ]

My code is exist Here

That's true I have both integer and equality constraints. But I eliminate the eqality constraints by converting them to inequality constraints. I want to solve my problem with considering generation 200 as stopping criteria condition.

[Alan Weiss]

You can set the MaxGenerations option to 200 if you like. See ga options.

Alan Weiss

MATLAB mathematical toolbox documentation

[S AsZ]

Is there any way that MATLAB will display fitness value chart instead of penalty value chart, when I have a mixed integer programming with linear constraints?

Because I need fitness value chart not penalty value chart!

[Alan Weiss]

You can create a custom output function (or custom plot function) to do what you want.

Alan Weiss

MATLAB mathematical toolbox documentation

[S AsZ]

Thank you so much ?

[S AsZ]

Excuse me again I have an author question: How can I write multi objective functions with Optimproblem format? My mean is using problem based method not using solver based method.

[Alan Weiss]

I suggest that you open a new question for this. I do not quite understand what you are asking.

Alan Weiss

MATLAB mathematical toolbox documentation