matlab fprintf error? please help
5 views (last 30 days)
Show older comments
Hi all,
I am very very new to matlab, and I am trying to run a script that will read my txt files and write it on my xlsx file. I have about 120 txt files, so I am trying to run a script on them, but I keep having this fprintf error on a part of my script.
fid = fopen(sprintf('%s/Timeseries.ROIs/%s_timeseries.xlsx',rootdir,rois{roi}),'w');
colhdrs = {'Subject','Group','Gender','Subject','Condition','-4.4', '-2.2', '0', '2.2', '4.4', '6.6', '8.8', '11', '12.2'};
fprintf(fid,'%s\t',colhdrs{:}); fprintf(fid,'\n');
I keep facing an error with the script line below.
frpintf(fid, '%s \ t', colhdrs {:});
saying that it has Invalid file identifier. Use fopen to generate a valid file identifier.
Again, I am very new so any help would be much appreciated. Thank you so much!
0 Comments
Answers (1)
per isakson
on 29 Sep 2020
Most likely, fid = fopen(...), failed and return a negative value to fid.
Replace
fid = fopen(sprintf('%s/Timeseries.ROIs/%s_timeseries.xlsx',rootdir,rois{roi}),'w');
by
ffs = fullfile( rootdir, 'Timeseries.ROIs', [rois{roi},'_timeseries.xlsx'] );
[fid,msg] = fopen( ffs, 'w' );
and run the script and inspect the values of ffs, fid and msg.
1 Comment
Walter Roberson
on 29 Sep 2020
And remember that when you fopen() a file for 'w', that the underlying operating system will not automatically create any missing directories. If rootdir is not a directiory, or if Timeseries.ROIs is not a directory within rootdir, then the fopen() would fail.
See Also
Categories
Find more on Audio and Video Data 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!