[FieldTrip] Leadfield and source contain NaN

"Jörn M. Horschig" jm.horschig at donders.ru.nl
Mon Dec 16 09:22:16 CET 2013

Dear Azeez,

some gridpoints might fall outside the head, thus no source activity is 
computed and the respective value is set to nan. In your grid or 
leadfield-structure you got the fields .inside and .outside. You can use 
these as indices to find the respective values of sourceactivity only 
inside (or outside) the brain. You can use the indices in analog to this 
(see the call to ft_plot_mesh)


On 12/13/2013 7:06 PM, Azeez Adebimpe wrote:
> Dear All,
>  I calculated leadfield  with 64 electrodes but majority of part of 
> leadfield.leadfield consist of NaN and some with values and I ensured 
> the electrode is projected on the head (but some not touching the head 
> directly but at the right position). Please help me with what I am 
> missing please. Whenever I used the leadfield to calculate source, it 
> also contain NaN.
> Azeez Adebimpe
> _______________________________________________
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> fieldtrip at donders.ru.nl
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Jörn M. Horschig
PhD Student
Donders Institute for Brain, Cognition and Behaviour
Centre for Cognitive Neuroimaging
Radboud University Nijmegen
Neuronal Oscillations Group
FieldTrip Development Team

P.O. Box 9101
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E-Mail: jm.horschig at donders.ru.nl
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