Optimization of a matrix variable

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Soumili Sen 2022-3-24

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评论： Soumili Sen 2022-3-24

Hello all,

I am writting a code for optimization where I have a optimizing variable as a matrix of N*L.How I can declare this matrix variables within a function as an objective function?

I am trying like that,

N=2;

L=10;

z = rand(N,L);

r= mainfcn(z,N)

function r= mainfcn(z,N)

a=z(N:L);

r = a.^2- 1;

end

here I am getting 'a'= as a vector not a matrix. How I can make 'a' as a matrix of N*L?

Thanks in advance.

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采纳的回答

Jan 2022-3-24

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https://ww2.mathworks.cn/matlabcentral/answers/1679659-optimization-of-a-matrix-variable#answer_926024

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By:

a = z; % instead of z(N:L)

? This looks trivial, so do I oversee a detail?

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Soumili Sen 2022-3-24

Now it's working. Thanks a lot.

Soumili Sen 2022-3-24

Hey, sorry for bothering you,

If,

z = rand(3,2);

r= mainfcn(z)

function r= mainfcn(z)

a=z(1:L); ----> want only first row(1*2 vector)

b= z(2:end); -----> want 2nd row and 3rd row(2*2 matrix)

r = a.^2+b.^2- 1;

end

How I can correct this code?

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