how to change specific row for all file inside a folder?

Greeting sir, I have multiple text file inside a folder which has 18 rows in each file. I wanted to delete the last row of all file inside the folder. How can I do it?

[Rik]

What have you tried? Do you have a list of file names stored in a variable?

Answer 1

[Jan]

Two steps:

1. Implement the code to process 1 file. The easies way is to import the file using readlines, remove the last line and to export it by writelines afterwards.
2. Run the above code in a loop. See FAQ: How can I process a sequence of files?

If you have a large number of huge files, maybe this can help to improve the speed: FEX: FileResize . Then determine the start of the last line:

file = 'YourFile.txt';
[fid, msg] = fopen(file, 'r');  % Not in 't' mode!!!
assert(fid > 0, msg);  % No FOPEN without checking for success!!!
s = '';
while ischar(s)
    c = ftell(fid);  % Get current position
    s = fgets(fid);  % Read next line
end
fclose(fid);
FileResize(file, c, 'set');

Of course: Create a backup of the data set before testing.

[adhi dermawan]

thank you sir