How to make dynamic variable names (A1, A2, A3, ..., ) with "for" loop?

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abdelkrim bensmaine 2021-12-15

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1611435-how-to-make-dynamic-variable-names-a1-a2-a3-with-for-loop

评论： abdelkrim bensmaine 2021-12-15

采纳的回答： Rik

在 MATLAB Online 中打开

Hello community,

my knowledge of Matlab is limited, I admit it. So, I am sorry if I am going to make mistakes.

I have to create a series of variable using a "for" loop to associat it with a TF in order to draw Bode diagram for each delay,I tried this but it didn't work:

num = [1];
dem = [1 1 0 0];
T=[0.1,0.5,2,3,4,20];%% delay
% ind='A,B,C,D,E,F';
% index=strsplit(ind,',')    I tried to make a variable with index(j) but
% it didn't work for me
for i=1:length(T)
    for j=1:length(T)
       eval(['A' num2str(j) ])=tf(num ,dem,'Inputdelay',T(i));
       for plotId = 1 : 6
            subplot(3,2,plotId), bode(A(j))
            grid on;
            title(['delay=',num2str(T(plotId))])
        end
    end
end

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Answer 1

Rik 2021-12-15

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1611435-how-to-make-dynamic-variable-names-a1-a2-a3-with-for-loop#answer_855690

在 MATLAB Online 中打开

Don't use numbered variables. Use cell arrays instead. I also changed your loops to use n instead of i and j (as they can be cofused for sqrt(-1)) and replace length with numel, as that is probably what you meant.

Since your three loops seemed to do the same thing, I merged them.

num = [1];

dem = [1 1 0 0];

T=[0.1,0.5,2,3,4,20];%% delay

% ind='A,B,C,D,E,F';

% index=strsplit(ind,',') I tried to make a variable with index(j) but

% it didn't work for me

for n=1:numel(T)

A{n}=tf(num ,dem,'Inputdelay',T(n));

subplot(3,2,n), bode(A{n})

grid on;

title(sprintf('delay=%.1f',T(n)))