replacing the content of a text file
2 views (last 30 days)
Show older comments
Hi all. I have a text file "A.txt". I have a string S='Hello World'.
How to delete from line 10 to the end of file in "A.txt" and replace those deleted contents by string S, and save the new file to "B.txt"?
2 Comments
Answers (1)
Image Analyst
on 17 Aug 2018
Try this:
S='Hello World';
% Open the input file for reading.
fullInputFileName = 'A.txt';
inputFileID = fopen(fullInputFileName, 'rt');
% Open the input file for reading.
fullOuputFileName = 'B.txt';
outputFileID = fopen(fullOuputFileName, 'wt');
% Transfer the first 9 lines.
for k = 1 : 9
% Read the line.
textLine = fgetl(inputFileID);
fprintf('Transferring line #%d: "%s"\n', k, textLine);
% Write the line.
textLine = fprintf(outputFileID, '%s\n', textLine);
end
% Write S to B.txt
textLine = fprintf(outputFileID, '%s\n', S);
% All done reading all lines, so close the file.
fclose(inputFileID);
fclose(outputFileID);
fprintf('\n--------------------------------\nHere is B.txt:\n');
type(fullOuputFileName);
0 Comments
See Also
Categories
Find more on Text Data Preparation in Help Center and File Exchange
Products
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!