writing a matrix into a .txt file

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Oded Scharf 2018-2-13

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编辑： Stephen23 2018-2-13

I have a matrix of 65x10 and i want to open and write 9 txt files (from 2:10) each named by the first row at its column and contains two columns: the first column is the first column of the matrix (contains str) and the second one is the i'th column of the matrix (contains int) (starting from the second row). Also I need a title for both columns in each file.

Thanks, Oded

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Answer 1

Stephen23 2018-2-13

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https://ww2.mathworks.cn/matlabcentral/answers/382344-writing-a-matrix-into-a-txt-file#answer_304871

编辑：Stephen23 2018-2-13

在 MATLAB Online 中打开

You do not specify what kind of matrix you have, so I will assume that it is a cell array (as a numeric array would not hold string/char data). This code should get you started, please experiment and adapt as required:

P = '.'; % directory path
C = 65x10 cell array
for k = 2:size(C,2)
    N = sprintf('column_%d.csv',k);
    [fid,msg] = fopen(fullfile(P,N),'wt');
    assert(fid>=3,msg)
    fprintf(fid,'%s,%s\n',C{1,[1,k]});
    tmp = C(2:end,[1,k]).';
    fprintf(fid,'%s,%d\n',tmp{:});
    fclose(fid);
end

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Oded Scharf 2018-2-13

thank you! it really helped

Stephen23 2018-2-13

编辑：Stephen23 2018-2-13

@Oded Scharf: I hope that it helps. Please ask if you have more questions. You should also accept the answer that helps to resolve your original question, as this shows to others that your question has been resolved.

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