How can i select variables which has same number at the end

You can combine string pattern search and eval in order to accomplish what you want. However, in general, it is not recommended to use eval with dynamically named variables. It would be difficult to debug in a near future.

clear;
time_2500= transpose(linspace(0,100, 2500));
T_Right_F_2500 = rand(2500,1);
time_100 = transpose(linspace(0,100, 100));
T_Right_F_100 = rand(100,1);
time = 0:0.01:100;
% Let's see what variables are in workspace
varNames = string(who);
% Let's extract which digits patterns there are 
% The pattern is "time_" plus something.
pat = "time_"+digitsPattern;
idxWithDigits = contains(varNames, pat);
myDigitsPats = unique(extract(varNames(idxWithDigits), pat));
myDigitsPats = extractAfter(myDigitsPats, "_");
for i_pat = 1:length(myDigitsPats)
    % What to evaluate:
    % res_100 = interp1(time_100, T_Right_F_100, time);
    str = "res_"+myDigitsPats(i_pat)+ "= interp1(time_" + myDigitsPats(i_pat)+", T_Right_F_"+myDigitsPats(i_pat)+", time);";
    eval(str)
end
who
Your variables are:

T_Right_F_100   i_pat           myDigitsPats    res_100         str             time_100        varNames        
T_Right_F_2500  idxWithDigits   pat             res_2500        time            time_2500       

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Answer 2

Matt J 2024-1-24

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2073481-how-can-i-select-variables-which-has-same-number-at-the-end#answer_1395876

编辑：Matt J 2024-1-24

在 MATLAB Online 中打开

You shouldn't have variables named that way. You should have a cell array T_Right_F{i}, and times{i} and should use indexing to get the corresponding ones,

interp1(time,T_Right_F{224},times{224})

See alos,

https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval

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Matt J 2024-1-24

在 MATLAB Online 中打开

Then you should undo that damage before proceeding with further work. E.g.,

time_1=[10,20];
time_2=[30,40];
time_3=[50,60];
Times=cell(1,3);
for i=1:numel(Times)
    Times{i}=eval("time_"+i);
end
Times
Times = 1×3 cell array
    {[10 20]}    {[30 40]}    {[50 60]}