FMRIB: EEGLAB error in function fmrib_fastr() at line 882

[nucleuscub]

Issue transferred from Bugzilla (Bug 692)

Makoto 2008-11-13 18:49:40 PST
Hi arno. Here is the new one I found when using FMRIB implemented in EEGLAB2008Oct. The error message is as follows:

EEGLAB error in function fmrib_fastr() at line 882
Index exceeds matrix dimensions

The line 882 is

[apc,ascore,asvar]=pca_calc(pcamat(1:pccount,:)');

where, in my case,

pcamat = <28x51001 double>
pccount = 29

The lines from 870 to 879 are as follows:

        for s=starts+1:lasts-1
            % construct PCAMAT
            if skcount==pick(pccount)
                pcamat(pccount,:)=...
                    Ipca(secmarker(s)-pre_peak:...
                    secmarker(s)+max_postpeak);
                pccount=pccount+1;
            end
            skcount=skcount+1;
        end

It seems pccouont+1 AFTER calculating pcamat(pccount,:).
Thus, pccount is one too many compared to the number of rows of pcamat whenever the program go out from this loop.

So I added a change at the line 882

[apc,ascore,asvar]=pca_calc(pcamat(1*(pccount-1),*)');

and now it seems working. Please check if it is ok.

Strange thing is that I must have used the same version of FMRIB half a year ago but did not encounter the same error. I have no idea how this happened.

Makoto

[reply] [−]Comment 1Makoto 2008-11-13 18:56:44 PST
Sorry for the mistype. The modified Line 882 is

[apc,ascore,asvar]=pca_calc(pcamat(1:(pccount-1),:)');

[reply] [−]Comment 2Arnaud Delorme 2008-11-13 19:02:30 PST
I am adding Rami to the list of Bug recipient for this problem. He is the developper of FMRIB. Hopefully he can fix the problem.

Best,

Arno