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Reading .txt files and replace lines from one file to another

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Ivan Mich
Ivan Mich on 7 Apr 2020
Edited: Ivan Mich on 20 Apr 2020
Hello, I have a problem with a code.
First of all I have two .txt files, file1.txt and file2.txt. my problem is how to replace one line from one .txt with a line from another .txt file
I am uploading the two files in order to understand what I want to do. in these files, I would like to replace line 3 from File2 once with the first line of File1, once with the second line of file1 and once with the third line of File1.
I have to mention that i use readfile('File2.txt') in order to read this file.

Answers (1)

Walter Roberson
Walter Roberson on 7 Apr 2020
lines1 = regexp(fileread('File1.txt'), '\r?\n', 'split');
lines2 = regexp(fileread('File2.txt'), '\r?\n', 'split');
replaced_lines = [lines2(1:2); lines1(2:4); lines2(3:end)];
fid = fopen('New_File2.txt', 'wt');
fprintf(fid, '%s\n', replaced_lines{:});
Ivan Mich
Ivan Mich on 20 Apr 2020
I have written this code but I can not find the in order to run once for the first line of 2nd and 3rd column of File3 and execute the .exe, once for the second line of 2nd and 3rd columns and execute the .exe etc.
for i=1:size(t3,1)
replaced_lines = [e(1:36);k;e(38:67);M(1:1);e(69:116);tr;ex(118:178);(t3(i,:)); e(180)]
fid = fopen('file2.txt', 'wt');
fprintf(fid, '%s\n', replaced_lines{:});

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