cfg.neighbourdist unit measurement?

Andre Bastos abastos at BERKELEY.EDU
Thu Jun 28 19:04:57 CEST 2007


Dear Heather,



With a standard 64 channel montage, I created neighbourhood locations using
neighbourdist values between 1 and 100, and then evaluated each structure to
see which one specified 5 neighbors for T8, 8 for Cz, and 4 for Fp1. 48, 49,
and 50 seemed to satisfy this so I just took the middle value.



You may have to play around with this value depending on the size of your
montage.



Good Luck,



-Andre



From: FieldTrip discussion list [mailto:FIELDTRIP at NIC.SURFNET.NL] On Behalf
Of Eric Maris
Sent: Thursday, June 28, 2007 3:29 AM
To: FIELDTRIP at NIC.SURFNET.NL
Subject: Re: [FIELDTRIP] cfg.neighbourdist unit measurement?



Dear Heather,





Please can someone tell me whether the cfg.neighbourdist needed to define
clusters is in cm or mm?  (i.e. if I want a 3cm distance, should the value
be 3 or 30?)



You should specify cfg.neighbourdist on the same scale as the scale in which
your sensor coordinates (in the .grad or .elec field) are expressed. See the
help of NEIGHBOURSELECTION.





Good luck,



Eric Maris





dr. Eric Maris

NICI/Biological Psychology and

F.C. Donders Center for Cognitive NeuroImaging

University of Nijmegen

P.O. Box 9104

6500 HE Nijmegen

The Netherlands

T:+31 24 3612651 (NICI)

T:+31 24 3610754 (FCDC)

F:+31 24 3616066 (NICI)

E: maris at nici.ru.nl

MSc Cognitive Neuroscience : <http://www.ru.nl/master/cns/>
www.ru.nl/master/cns/



Thanks,

Heather





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The aim of this list is to facilitate the discussion between users of the
FieldTrip toolbox, to share experiences and to discuss new ideas for MEG and
EEG analysis.

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http://www.ru.nl/fcdonders/fieldtrip/

----------------------------------

The aim of this list is to facilitate the discussion between users of the
FieldTrip toolbox, to share experiences and to discuss new ideas for MEG and
EEG analysis.

http://listserv.surfnet.nl/archives/fieldtrip.html

http://www.ru.nl/fcdonders/fieldtrip/


----------------------------------
The aim of this list is to facilitate the discussion between users of the FieldTrip  toolbox, to share experiences and to discuss new ideas for MEG and EEG analysis. See also http://listserv.surfnet.nl/archives/fieldtrip.html and http://www.ru.nl/fcdonders/fieldtrip.
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