[FieldTrip] plv and sourceanalysis

jan-mathijs schoffelen jan.schoffelen at donders.ru.nl
Thu Apr 7 14:28:18 CEST 2011

Dear Sibylle,

You confuse me a bit. You mention ft_sourcedescriptives in combination  
with freq data. Do you mean that you have source-level data in the  
frequency domain, or do you have freq-data, as in sensor level data  
having been processed by ft_freqanalysis? In the former case, I do not  
recall that ft_sourcedescriptives could compute a plv. In the latter  
case: it was indeed supported by ft_freqdescriptives.
A while ago we moved the functionality of ft_freqdescriptives dealing  
with coherence/plv etc to ft_connectivityanalysis. So I'd suggest to  
have a look there. Also, I think it should be possible to use  
ft_connectivityanalysis to compute source level plv, but this may  
still need some tweaking.

Best wishes,


On Apr 7, 2011, at 12:55 PM, sibylle wrote:

> Dear Fieldtrippers,
> I have a couple of question and I hope someone can help me:
> How is it possible to compute plv (for freq data)?
> As far as I can remember there used to be an option within  
> ft_sourcedescriptives, which seems to have disappeared.
> How can one use plv to determine connectivity in source space?
> Thanks a lot & best wishes,
> Sibylle
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Dr. J.M. (Jan-Mathijs) Schoffelen
Donders Institute for Brain, Cognition and Behaviour,
Centre for Cognitive Neuroimaging,
Radboud University Nijmegen, The Netherlands
J.Schoffelen at donders.ru.nl
Telephone: 0031-24-3614793

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