sym in matlab

[Antonio22]

Hi everyone! I'm new to using matlab and I have a problem!!

My objective is to find a function in 4 variables and solve an optimization problem (minimizing the function). So i used the command "Sym" to define the variables, but for calculate this function, i need to calculate the eigenvalues problem ​​of a matrix. To evaluate this problem the program becomes too slow.

I have seen that the problem is in defining the variables as "sym", as it is a very slow command. How else could I define them? Unfortunately "double", not being numerical variables, does not work.

Thank you very much in advance for your reply!

 

[GregLocock]

I am 99% confident that using sym is unnecessary.

Cheers

Greg Locock


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[GregLocock]

https://www.mathworks.com/help/gads/computing-objective-functions.html

and related articles would be good reading

Cheers

Greg Locock


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[IRstuff]

Other than for academic interest, why would you need a symbolic solution?

TTFN (ta ta for now)
I can do absolutely anything. I'm an expert!

https://www.youtube.com/watch?v=BKorP55Aqvg

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[Antonio22]

I need a symbolic solution ( a symbolic function)in order to optimize symbolic parameters!!

My problem is that the fitness fuction is very complicated to derive, and it comes out of many operations with unknown variables!!

 

[GregLocock]

Hopefully IRStuff can figure out what you are trying to do, I certainly can't.

Cheers

Greg Locock


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[Antonio22]

I have a problem to find the function to minimize!
I insert a picture for example.