How to display the value of a specific component of the objective function after computation is done?
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Good evening,
I was looking through Matlab documentation for genetic algorithm and I found the following example: "Plan Nuclear Fuel Disposal Using Multiobjective Optimization" https://www.mathworks.com/help/gads/multiobjective-nuclear-fuel-disposal.html
After reading through that example, I have a question. Is it possible to display/know the value of a specific component of the objective function for a certain point on the Pareto front after the computation is over?
For instance, if I want to know the value of the objective function "cost" for the first point on the front, the command is:
display(sol(1).cost)
But through this command I get the total cost calculated for the first point.
What if I want to know the value for the third cost component? Is there any way to determine it or not? I tried the following: display(sol(1).cost(3)) but apparently it doesn't work.
Do you have any pointers?
I hope my question is clear. If you need any clarification let me know. I will gladly answer any question and I will be really thankful for any suggestions.
Kind regards,
William
2 件のコメント
Walter Roberson
2023 年 1 月 22 日
(I am trying to investigate this, but the script is running very slowly on my machine :( :( :( )
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Alan Weiss
2023 年 1 月 23 日
I'd be very interested to know what you think of the nuclear fuel disposal example.
But to answer your question, let's look at an example that is faster to compute.
x = optimvar("x",1,2,LowerBound=-50,UpperBound=50);
fun(1) = x(1)^4 + x(2)^4 + x(1)*x(2) - x(1)^2*x(2)^2 - 9*x(1)^2;
fun(2) = x(1)^4 + x(2)^4 + x(1)*x(2) - x(1)^2*x(2)^2 + 3*x(2)^3;
prob = optimproblem("Objective",fun);
rng default % For reproducibility
sol = solve(prob)
Look at the two objective components at the first solution point.
t = sol(1).Objective
Look at just the second objective component at the first solution point.
ob = sol(1).Objective(2)
This is exactly what you tried, and it works fine for me.
Alan Weiss
MATLAB mathematical toolbox documentation
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