[Eeglablist] Error while precomputing STUDY: NaN values in cluster.sets

Akshay Maggu akshaymaggu86 at gmail.com
Wed Nov 25 07:41:56 PST 2015

Hi Nikola,

I am facing the same issue. All pre-processing steps carefully followed and
ICAs done for all subjects. But still this 'Na' error (
pops up saying that some of the datasets have ICA decompositions missing.

Let's see what experts on the list have to say about it.


On Tue, Nov 24, 2015 at 7:33 AM, Nikola Vukovic <vukovicnikola at gmail.com>

> Dear EEGLAB list
> I would be very grateful is someone could help me out with an error I've
> been getting. When I try to precluster components in a given STUDY (it
> happens for several study files), I get the following error:
> because some datasets do not have ICA pairs. Look for NaN values in
> STUDY.cluster(1).sets which indicate missing datasets. Each column in this
> array indicate datasets with common ICA decompositions.
> Looking inside the cluster(1).sets, I can indeed find some NaN fields, suggesting not all files have associated ICA decomposition data. This, however, is puzzling because I made sure to do ICA on each subject's dataset *before* epoching, meaning that all sets for individual conditions share the same weights for a subject. After getting this error I even tried to copy the weights (EEG.icawinv + EEG.icasphere + EEG.icaweights + EEG.icachansind) from the unepoched set to all the epoched ones.
> Did anyone have this error too, and how could it be solved?
> Thanks for any help,
> Nikola
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Akshay Raj Maggu,
PhD Candidate,
Laboratory for Language, Learning and the Brain,
Department of Linguistics and Modern Languages,
The Chinese University of Hong Kong,
Hong Kong.
Webpage: http://www.cuhk.edu.hk/lin/new/people/students/maggu/
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