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Bug 2219 - reading 4D header with empty label
| Status | CLOSED WORKSFORME |
| Reported | 2013-07-10 15:10:00 +0200 |
| Modified | 2013-07-16 21:39:26 +0200 |
| Product: | FieldTrip |
| Component: | fileio |
| Version: | unspecified |
| Hardware: | PC |
| Operating System: | Linux |
| Importance: | P3 normal |
| Assigned to: | Jan-Mathijs Schoffelen |
| URL: | |
| Tags: | |
| Depends on: | 2027 |
| Blocks: | |
| See also: |
Yuval - 2013-07-10 15:10:05 +0200
When reading a 4D header with digitized electrodes I often get an error. I tracked it to the loop in read_4D_hdr.m, line 370. for k = 1:Npoints tmp = fread(fid, 16, 'uchar'); tmplabel = char(tmp(tmp>0)');... what happens is that for the last Npoint its tmplabel is an empty matrix. therefore the elseif line fails. I overcame it by adding the lines: if isempty(tmplabel) tmplabel=' '; end here is the whole loop for k = 1:Npoints tmp = fread(fid, 16, 'uchar'); tmplabel = char(tmp(tmp>0)'); if isempty(tmplabel) tmplabel=' '; end if strmatch('Coil', tmplabel), label{k} = tmplabel(1:5); elseif ismember(tmplabel(1), {'L' 'R' 'C' 'N' 'I'}), label{k} = tmplabel(1); else label{k} = ''; end tmp = fread(fid, 3, 'double'); pnt(k,:) = tmp(:)'; end
Yuval - 2013-07-10 15:11:51 +0200
Hi I found this bug with unusual digitization data. I didn't attach data as I don't have trimmed data handy. if necessary I'll prepare some. thanks, Yuval
Jan-Mathijs Schoffelen - 2013-07-15 11:12:39 +0200
Hi Yuval, Thanks for reporting this. I'll include your suggested fix. Sorry for the inconvenience. JM
Jan-Mathijs Schoffelen - 2013-07-15 11:36:59 +0200
Hi Yuval, Are you by any chance using a very old version of the code? I don't find the lines you mentioned in a more recent version. I may have encountered this issue before, and changed it already. Could you confirm the outdated version and try with the most recent one?