What is penalty value in GA

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SeungJu Choi
SeungJu Choi 2022-1-6
回答： Alan Weiss 2022-1-7
Hello,
I am a student who is using optimization MATLAB GA toolbox.
Now I'm doing binary optimization include nonlinear constraints.
But, I have ask you something and several problems are occurring in my code.
First, when I plotting a graph, I can see the generation-penalty value(G-P) graph. In here, what is a meaning of penalty value?
It is same function value? (The function value I mean refers to the value of the objective function)
Second, when I look at the G-P graph(below the picture) I got, there is a ridiculous value(it means penalty value) in the previous generation.
Is this a normal?
If that is normal, then why does the front part of generation come out like that?

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回答（1 个）

Alan Weiss
Alan Weiss 2022-1-7
The documentation describes the penalty value.
As for the lower-left portion of the plot, these points are infeasible. Once ga finds a feasible point, the penalty value changes. See the description of the penalty value.
Alan Weiss
MATLAB mathematical toolbox documentation

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