Copy and paste all lines from the first text file to another text file after certain line numbers

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Birsen Ayaz-Maierhafer 2022-12-22

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https://ww2.mathworks.cn/matlabcentral/answers/1883337-copy-and-paste-all-lines-from-the-first-text-file-to-another-text-file-after-certain-line-numbers

评论： Mathieu NOE 2022-12-22

Hi,

I would like to copy and paste the values from the first txt file (Al.txt) to another text file (TestFile1.txt) after line 6. It should look like the TestFileWithAl.txt. It is copy and paste the values without loosing the rest of the information in TestFile1.txt

I wrote the follwing code The following code does not tell which line to paste in TestFile1.txt. How will I tell copy and past after line 6?

tmp = readlines('Al.txt');
writelines(tmp(1:end), 'TestFile1.txt')

Thank you for your help

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Answer 1

Mathieu NOE 2022-12-22

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hello

try this

simply split and concatenate the strings then save the result

for me with writematrix as I run R2020, with writelines if you are equipped with R2022

tmp1 = readlines('Al.txt');
tmp1(strcmp(tmp1,"")) = []; % removes empty lines (needed ?)
tmp2 = readlines('TestFile1.txt');
line_insertion = 6; % define at which line of A1 text you insert TestFile1 text
out = [tmp2(1:line_insertion-1); tmp1; tmp2(line_insertion+1:end)];
writelines(out, 'Output.txt')
% writematrix(out, 'Output.txt') % before R2022