How can we optimize two fucntions in genetic algorithm ?

Suppose that we have two functions F1(X) and F2(X), where X=[x1,x2,x3,...xn]

we want to find the minimum value of F1 such taht F2(X)<= desired value

How can we do that by using genetic algorithm tool box in maltab ?

your help and consideration are much appreciated

Answer 1

[Walter Roberson]

use F2(x)<target as a nonlinear inequality constraint .

[Oussama GASSAB]

please can you explain more ? example

[Oussama GASSAB]

i have this kind of problem

Error in the following problem input(s):

nonlcon: Not enough input arguments.

[Oussama GASSAB]

this is my constrain function

function [T,ceq]=my_constrain_1(tuk0)

T=SLL_1(tuk0)+20 ;

ceq=[] ;

end

[Walter Roberson]

perhaps SLL_1 needs more inputs ?

[Oussama GASSAB]

i dont think so, SLL_1 function it works very well, i have test it already

[Walter Roberson]

dbstop if caught error

then execute and see where it stops

[Oussama GASSAB]

please, can you give me an screen shot ?

[Walter Roberson]

[Oussama GASSAB]

what does that mean ?

[Walter Roberson]

You asked for a screen shot, so I sent you a screen shot. I change directory to a directory I set aside for working on your question (which is question #431109). I used ls to be sure that the directory was empty in case I was in the wrong directory. Then I give the

dbstop if caught error

command that I told you before, and which appears to be what you were asking to see a screenshot of. (I don't know, perhaps you needed to see that it was being issued at the command line.) After that I start optimtool, the tool you seem to be using. You would then fill in the various fields, choosing the solver, entring the population and so on. Then you would ask to execute.

Eventually the error about insufficient input arguments would show up. At that point you should command

dbstack

to see which line was executing at the time of the problem.

[Oussama GASSAB]

thank you so much, i will try that