code for calculate points

hello everyone, i want to write a code to calculate these for 121 points

for n = 1:nfreq

T1=[B(n) C(n);D(n) H(n)]

T2=[R(n) G(n);E(n) L(n)]

T=T1*inv(T2)

do you know I could do this?

Answer 1

[Clayton Gotberg]

The code you've already written will calculate those values for each of 121 points.

for n = 1:nfreq
    T1=[B(n) C(n);D(n) H(n)]
    T2=[R(n) G(n);E(n) L(n)]
    T=T1*inv(T2)
end

If you want to save the results of those calculations to use later, you can save the values in an array during the loop. For this case, with each thing you want to save being a matrix itself, I would recommend a cell array.

for n = 1:nfreq
    T1=[B(n) C(n);D(n) H(n)];
    T2=[R(n) G(n);E(n) L(n)];
    T{n}=T1*inv(T2); % The curly braces are used to index in cell arrays
end

% example T
{{[1 2; 4 3]},{[5 3; 7 6]}}
%     ^            ^
%    T{1}         T{2}
%   1    2       5    3
%   4    3       7    6

[Nara Lee]

thanks for your help it worked

now I want eigen value of its all cells T{n}

[Clayton Gotberg]

I recommend you do the eigenvalue operation in the same loop, so you don't have to loop twice (I think it should save some time). You can use the eig function to get the eigenvalues (and eigenvectors if needed) and can save the results in the same way as the matrices are saved.

If you have any further questions I recommend you make another question so that all of the site can easily find it.

[Nara Lee]

thank you so much

i tried this but i get error that there is no eig for cell(Undefined function 'eig' for input arguments of type 'cell'.)

ei{n}=eig(T);

[Nara Lee]

then i do ei{n}=eig(T1*inv(T2))

it worked

thank you for ypur help