I want my function to return -1 when the file doesn't open.

1 view (last 30 days)
I want my function to return -1 when the file doesn't open. But this happens

Accepted Answer

Voss
Voss on 2 Apr 2022
Your code is explicitly throwing the error, here:
error('error opening file %s\n',fname);
You can remove that line (and the next one because there is no need to close a file that's not open), so that that part looks like this:
if fid < 0
charnum = -1;
return
end
Then the function will return -1 in that case.
  2 Comments

Sign in to comment.

More Answers (1)

Riccardo Scorretti
Riccardo Scorretti on 2 Apr 2022
Edited: Riccardo Scorretti on 2 Apr 2022
Hi. You must return just after assigning the value -1 to charnum. If you call the function error... well, you get an error message and the program stops. Use warning instead.
if fid == -1
charnum = -1;
warning('error opening file %s', fname);
return
end

Tags

Products

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!