How to edit a text file using matlab?

Question

imed NASRI 2014-3-19

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/122189-how-to-edit-a-text-file-using-matlab

回答： Akira Agata 2017-11-12

Hello,

I have a text file that is in the following form:

    1 1 4 0 6
    1 2 9 5 6

I want to add braces and semicolons on all lines of the file to have the following form:

    {1,1,4,0,6},
    {1,2,9,5,6}

I am looking for a matlab function that does this automatically without having to change my file manually because the original file contains 200 lines. thank you

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Answer 1

David Sanchez 2014-3-19

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https://ww2.mathworks.cn/matlabcentral/answers/122189-how-to-edit-a-text-file-using-matlab#answer_129073

在 MATLAB Online 中打开

fid =fopen('your_file.txt');
C=textscan(fid,'%s','delimiter','\n');
fclose(fid);
for k=1:numel(C{1,1})
    tmp = regexp(C{1,1}(k),'\s'); % find empty spaces
    C{1,1}{k,1}(tmp{1,1}) = ','; % substitute empty spaces by ','
    C{1,1}(k) = strcat('{',C{1,1}(k),'},'); % add brackets
end
% print new file
fName = 'new_file.txt';
fid = fopen(fName,'w');            % Open the file
for k=1:numel(C{1,1}) 
  fprintf(fid,'%s\r\n',C{1,1}{k,1}); 
end
fclose(fid);

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imed NASRI 2014-3-19

Thank you very much

Thuan 2017-11-11

IGNORE this comment I just want to have a way to save this in my account as I like the code.

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Answer 2

Akira Agata 2017-11-12

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/122189-how-to-edit-a-text-file-using-matlab#answer_290621

在 MATLAB Online 中打开

Here is an another way to do that without using for-loop.

% After textscan
C = {'1 1 4 0 6';'1 2 9 5 6'};
% Replace space with ','
C = regexprep(C,'\s',',');
% Add '{' and '},' for each line
C = cellfun(@(x) ['{',x,'},'],C,'UniformOutput',false);
% Delete the last ',' at the last line
C(end) = regexprep(C(end),',$','');