using a variable to call another variable

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Irshad Qureshi 2022-9-16

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1806270-using-a-variable-to-call-another-variable

评论： Irshad Qureshi 2022-9-16

Hello all,

After doing analysis in some other software I get text files namely Eigen_1.txt, Eigen_2.txt.......Eigen_k.txt and each file is 4x4 matrix. I want to read each file, get the (1,3) value and assign it to variable T1_1, T1_2.......T1,k and then use this value to get omega1_1 and so on. I have used eval command which works fine, but is there any other way to solve this without using eval command.

for n = 1:k

temp = readmatrix(strcat('.\Results\Eigen_',num2str(n),'.txt'),'delimiter',' ');

eval(['T1_',num2str(n),'=temp(1,3)']);

eval(['omega1_',num2str(n),' = 6.2832/T1_',num2str(n),]);

end

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Stephen23 2022-9-16

@Irshad Qureshi: you might find this useful:

https://www.mathworks.com/matlabcentral/answers/228557-experts-of-matlab-how-did-you-learn-any-advice-for-beginner-intermediate-users

Irshad Qureshi 2022-9-16

thanks, Stephen.

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采纳的回答

Chunru 2022-9-16

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1806270-using-a-variable-to-call-another-variable#answer_1054505

编辑：Chunru 2022-9-16

在 MATLAB Online 中打开

T1 = zeros(k, 1);           % use array instead of T1_, T1_2, ...
omega1 = zeros(k, 1);   
for n = 1:k
    temp = readmatrix(strcat('.\Results\Eigen_',num2str(n),'.txt'),'delimiter','  ');
    %     eval(['T1_',num2str(n),'=temp(1,3)']);
    %     eval(['omega1_',num2str(n),' = 6.2832/T1_',num2str(n),]);
    T1(n) = temp(1, 3);
    omega1(n) = 2*pi/T1(n);
end