Genetic Algorithm Plot fval vs. generation

Dear friends,

I am using GA to solve a simple 3-variable constrained equation.

I am using the following line to get the final result

[gax,fval,termination,info]=ga(@three_var,3,[],[],[],[],lb,ub)

However, I want to plot fval vs. generation. i.e., fval of generation 1&2&3&4 etc..

How can I do this?

Thank you

Answer 1

[Star Strider]

Use:

options = optimoptions('ga','PlotFcn', @gaplotbestf);

[gax,fval,termination,info]=ga(@three_var,3,[],[],[],[],lb,ub,[],[],options)

See Plot Options.

.

[Suhaib Salah]

I really thank you. It worked with me when I updated MATLAB 2020b to 2022a

[Star Strider]

As always, my pleasure!

I am somewhat surprised that it did not work in R2020b. I do not remember when it was iintroduced (that information is not in the documentation).