open file with write permission in matlab

To open a file with write permission in Matlab, you can use the "fopen" function with "w" as the second argument. Here's an example:

main.m
fid = fopen('filename.txt', 'w');
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This will create (if it does not exist yet) and open the file called "filename.txt" in write mode. If the file already exists, it will be truncated to zero length.

After you finish writing to the file, remember to close it with "fclose":

main.m
fclose(fid);
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This will release the file handle and free system resources.