[Eeglablist] Problems with Creating Study and running precomputing - preclustering

[Makoto Miyakoshi]

Dear Maya,

Sorry for the trouble.

> each collected for only one condition

Do you mean there is no within-subject condition?

> ''Warning: ICA ERSP or ITC data files computed with old version of EEGLAB
for design 1 (and maybe other designs). These files may be corrupted and
must be recomputed.''

This message has been there for LONG time. It's a false alarm.

> '' Error using eeglab (line 1006)
Error: ()-indexing must appear last in an index expression.
You are using the latest version of EEGLAB.
Warning: STUDY moved since last saved, trying to load data files using
relative path
pop_loadset(): loading file C:\Users\tc025847\Desktop\Mitchell Replica
Experiment Files\EEG only\DATA\3\Category_5_ICAremoved.set ...
Reading float file 'C:\Users\tc025847\Desktop\Mitchell Replica Experiment
Files\EEG only\DATA\3\Category_5_ICAremoved.fdt'... ''

I don't know about this error.
Maybe your folder structure is bad... my guess is that STUDY is trying to
use relative path but failing. What I would try is that I would move all
the .set and precompute files into one folder and create another STUDY
there with exact same data and STUDY.design. In this way, you can skip
precompute and immediately start from precluster.

Makoto


On Tue, Jun 7, 2016 at 3:45 AM, Maya Pinacle <mayapinacle at gmail.com> wrote:

> Hi,
>
> I have just started using STUDY with EEGLAB, I have data from 10 subjects
> in different 10 folders, each collected for only one condition and I would
> like to extract clusters of ICs of those datasets using STUDY. I have
> already run ICA and Dipfit to extract ICs and corresponding dipoles. When I
> create a Study with those 10 subject's data and save it to a folder and
> again want to load it back to the EEGLAB, I always get this warning message
> in a popup window which says
>
>
> ''Warning: ICA ERSP or ITC data files computed with old version of EEGLAB
> for design 1 (and maybe other designs). These files may be corrupted and
> must be recomputed.''
>
>
> and also in the command line there is a warning saying
>
> '' Error using eeglab (line 1006)
> Error: ()-indexing must appear last in an index expression.
> You are using the latest version of EEGLAB.
> Warning: STUDY moved since last saved, trying to load data files using
> relative path
> pop_loadset(): loading file C:\Users\tc025847\Desktop\Mitchell Replica
> Experiment Files\EEG only\DATA\3\Category_5_ICAremoved.set ...
> Reading float file 'C:\Users\tc025847\Desktop\Mitchell Replica Experiment
> Files\EEG only\DATA\3\Category_5_ICAremoved.fdt'... ''
> ...
>
> This message continues for each single file that I have used to create
> STUDY. However there is no change of datesets' location at all but STUDY
> seems struggling to find the datasets. Eventually EEGLAB seems loading the
> *.study file and I run preclustering on the data, however there is no
> preclustering parameters are set either.
>
>
> These are the code lines how I run precomputing and preclustering
>
> % precomputing
>  [STUDY ALLEEG] = std_precomp(STUDY, ALLEEG,
> 'components','erp','on','erpparams',{'rmbase' [-200 1]
> },'scalp','on','spec','on','specparams',{'specmode' 'fft' 'logtrials'
> 'off'},'erpim','on','erpimparams',{'nlines' 10 'smoothing'
> 10},'ersp','on','erspparams',{'cycles' [3 0.5] 'freqs' [3 45] 'alpha' 0.01
> 'padratio' 1},'itc','on');
>
>
>  % preclustering
>  [STUDY ALLEEG] = std_preclust(STUDY, ALLEEG, 1,{'spec' 'npca' 5 'norm' 1
> 'weight' 1 'freqrange' [3 45] },{'erp' 'npca' 5 'norm' 1 'weight' 1
> 'timewindow' [-500 1000] },{'scalp' 'npca' 5 'norm' 1 'weight' 1 'abso'
> 1},{'dipoles' 'norm' 1 'weight' 10},{'ersp' 'npca' 5 'freqrange' [3 45]
> 'timewindow' [-500 1000]  'norm' 1 'weight' 1},{'itc' 'npca' 5 'freqrange'
> [3 45]  'timewindow' [-500 1000]  'norm' 1 'weight' 1},{'finaldim' 'npca'
> 5});
>
>
> These codes run smoothly however there is no parameters stored in
> theStudy.cluster.precluster.preclusterparams and preclusterdata
>
>
> And when I run all these processes on the sample data I got the same error
> messages and nothing was stored in those Study structures at all.
>
>
> Is there anyone encountered this problem before? Do you have any idea what
> could be the problem? I would appreciate any help please.
>
> Thank you,
>
> Maya.
>
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-- 
Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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