Create dummy files based on filename

Question

Jake 2020-3-19

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/511649-create-dummy-files-based-on-filename

评论： Jake 2020-3-19

Hello,

I have a directory with text files. They are named as A1,A2,A3,A4,A5, B1,B2,B3,B4,B5,C1,C2... and so on. Set A is one group of txt files, Set B is another and so on. All the sets should have (let's say) 5 txt files. However, not all the sets satisfy this requirement.

For example, I have sets like, D1, D3, D4, E5, F1, F2, F5.. etc. (note that Set D is missing D2, D5 and Set E is missing E1, E2, E3, E4 and so on)

Is it possible to read the directory, identify the missing files and create dummy/empty txt files matching the names as requirement specifies?

Any help/lead is warmly appreciated.

TIA!

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Answer 1

Walter Roberson 2020-3-19

1
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/511649-create-dummy-files-based-on-filename#answer_420827

suffix = '.txt';  %or as appropriate
prefixes = 'A': 'F';
for P = prefixes
    for K = '1' : '5'
        thisfile = [P K suffix];
        if ~exist(thisfile, 'file')
            fid = fopen(thisfile, 'w');
            fclose(fid);
        end
    end
end

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Walter Roberson 2020-3-19

suffix = '.txt';  %or as appropriate
prefixes = 'A': 'F';
for P = prefixes
    for K = {'1', '2', '5', '9', '13', '56'}
        thisfile = [P K{1} suffix];
        if ~exist(thisfile, 'file')
            fid = fopen(thisfile, 'w');
            fclose(fid);
        end
    end
end