Editing a txt file and replace a specifics lines

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judy abbott 2016-4-8

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评论： judy abbott 2016-4-8

Dear all, my question is about the edition of an txt file and the replacement of the 4 and the 5 line and keep the above ones and the after ones: txtfile = ZZZ.txt

Not change
Not change
Not change
TO change
TO change

Any suggestions please.

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Azzi Abdelmalek 2016-4-8

How you replace these lines?

judy abbott 2016-4-8

i look to replace the wholes lines (the 4 and the 5) by other lines, i think to do an counter (while .. do)

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Azzi Abdelmalek 2016-4-8

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编辑：Azzi Abdelmalek 2016-4-8

在 MATLAB Online 中打开

Read your text file

fid=fopen('ZZZ.txt')
s=textscan(fid,'%s')
fclose(fid)
out=[s{:}]

Then replace whatever you want

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Azzi Abdelmalek 2016-4-8

在 MATLAB Online 中打开

%lines that replace the two lines of out
line1='abc'
line2='efg'
out(4:5)={line1;line2}
fid=fopen('fic1.txt','w')
for k=1:numel(out)
 fprintf(fid,'%s\n',out{k})
end
fclose(fid)