An error using fprintf
3 views (last 30 days)
Show older comments
Hello,
I am currently getting an error while trying to save. This is what I currently have
function saveline(filename,line,mode)
fid = fopen(filename,mode);
fprintf(fid,line);
fclose(fid);
end
Then I get
Error using fprintf
Invalid file identifier. Use fopen to generate a valid file identifier.
Error in saveline (line 11)
fprintf(fid,line);
Any suggestions?
0 Comments
Answers (1)
Guillaume
on 2 Mar 2020
Edited: Guillaume
on 2 Mar 2020
Any suggestions?
Yes, for some reason, fopen failed to open the file. There can be many reasons, the most likely being that the file doesn't exist but other reasons are possible (permission problem, etc.)
You never check that the fopen succeeds which is never a good idea.
[fid, errmsg] = fopen(filename, mode);
if fid < 0
error('Failed to open "%s", the error message was: %s');
end
%...
would at least tell you what the problem is.
0 Comments
See Also
Categories
Find more on Data Import and Export in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!