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Editing large number of dat files

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012786534
012786534 2017-6-8
关闭： MATLAB Answer Bot 2021-8-20
Hello all,
I want to add the same comment to the second line of a large number of dat files and then place them in a new folder.
I was thinking of doing something like this:
NewFiles = fullfile(pwd, 'NewFiles')
if exist([pwd '\NewFiles'])~=7
mkdir(NewFiles);
end
files = dir(fullfile('*.dat'));
filenames = {files.name};
for i = 1 : length(filenames)
fid(i) = fopen(files(i),'w');
fprintf(fid,'try \n');
fclose(fid);
dlmwrite(fname,'-append') ;
end
This code does not work, obviously.
Any suggestions ?
Thank you

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