[Eeglablist] Using dipole coordinates derived outside of EEGLAB for clustering

[Ramón Martinez]

Dear Alex,
 This can be done by a few ways.
 1-Tweaking the field EEG.dipfit to fit your dipole information.
 2- Scripting a bit in std_preclust. More specifically in lines 320-343,
where the dipole info is passed for the pre-clustering.
 3- Using the option 'customfunc' in std_precomp so you can create a custom
field of computed measures (in this case your coordinates) and use this for
your pre-clustering and later clustering.

 Hope this helps.
Ramon


On Sat, Jul 2, 2016 at 9:27 AM, Alex Billig <ajbillig at gmail.com> wrote:

> Hello,
>
> I have an epoched MEG data set in EEGLAB, on which I have run an ICA.
> Because I was more familiar with SPM's source localisation functionality
> and forward models, I then exported the component scalp maps there to
> derive dipole locations using individual MRI scans. I would now like to
> cluster components in the EEGLAB study, using the SPM-derived dipole MNI
> coordinates as one of the clustering dimensions. I don't think this is
> possible in the EEGLAB GUI, which expects the dipoles to have been derived
> via DIPFIT. So I have started to work through the pop_preclust.m and
> pop_clust.m scripts to see where I might be able to moderate them to feed
> these coordinates. Neither function seems to refer to the EEG.dipfit field,
> so I am a little stuck. Has anyone else done this before, or can the
> programmers give me some pointers as to where in the code I need to be?
>
> Many thanks,
>
> Alexander Billig
> Postdoctoral Research Fellow
> Brain and Mind Institute
> University of Western Ontario
>
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-- 
_____________________________________________________
Ramon Martinez-Cancino
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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