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

Nikola Vukovic vukovicnikola at gmail.com
Mon Nov 30 00:37:09 PST 2015

Do any of the developers know how the Nan error in STUDY preclustering
could be solved?

On Wed Nov 25 07:41:56, Akshay Maggu wrote:

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 <http://sccn.ucsd.edu/mailman/listinfo/eeglablist>>

>* 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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