How to modify this could so it can read from different files groups?

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Ismail Qeshta 2019-2-20

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https://ww2.mathworks.cn/matlabcentral/answers/446023-how-to-modify-this-could-so-it-can-read-from-different-files-groups

评论： Ismail Qeshta 2019-2-21

采纳的回答： Bob Thompson

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Hi,

I have this code that reads from 10 files each maximum X value and its corresponding Y value and prints all results in one file (named "Result_1, Result_2,...")

Now, I have 400 files. I need to modify the code, so it can read the different groups sequentially and print the output file for each group.

For instance, I need it to read from 1 to 10, then from 11 to 20, then from 21 to 30, and so on until 391 to 400.

Hence, the printed output files are: Result_1 (for files 1 to 10), Result_2 (for files 11 to 20), and so on until the output file Result_40 (for files 391 to 400).

The code:

S = dir('*.out');
C = natsortfiles({S.name});
N = numel(C);
Z = nan(N,1);
for k = 1:N
    data = load(C{k}); 
    [~,idx] = max(data(:,1));
    Z(k) = data(idx,2);
end
dlmwrite('Result_1.txt',Z)

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采纳的回答

Bob Thompson 2019-2-20

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https://ww2.mathworks.cn/matlabcentral/answers/446023-how-to-modify-this-could-so-it-can-read-from-different-files-groups#answer_361914

Add a second loop. Instead of just going through all files in a single loop, have an outer loop that looks for the number of groups you have, and an inner loop that has the number of files in each group. The example below assumes you have a constant number of files in each group.

S = dir('*.out');
C = natsortfiles({S.name});
N = numel(C);
g = 10;
Z = nan(g,1);
for k = 1:N/g
    for j = 1:g;
        data = load(C{10*(k-1)+j}); 
        [~,idx] = max(data(:,1));
        Z(j) = data(idx,2);
    end
    dlmwrite(['Result_',num2str(k),'.txt'],Z);
end