[FieldTrip] Question about Phase locking value

[Yaocong Duan]

Hi Stephen,

Thank you for your response. I write something wrong in my previous email.
the freq structure does have trails information. but then I do a source
reconstruction and generate a source structure. phase locking value is
calculated from the source structure directly. However, the source
structure does not have any trails info (trails seems have been averaged).

source = ft_sourceanalysis(cfg, freq);
...
plv = ft_connectivityanalysis(cfg, souceSparse);


below are the freq structure generated by freq analysis, source structure
generated by source analysis as well as the .avg field of source structure.


[image: Inline images 1][image: Inline images 2][image: Inline images 3]

On 1 February 2018 at 18:02, Stephen Whitmarsh <stephen.whitmarsh at gmail.com>
wrote:

> Dear Yaocong,
>
> To understand your question, it would be helpful if you post the output of
> the freqanalysis, i.e. your *freq *datastructure. It should contain a .*pow
> *field, which should be an array of structs, numbering your number of
> trials, right?
>
> Cheers,
> Stephen
>
>
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> On 1 February 2018 at 18:31, Yaocong Duan <yaocong.duan at gmail.com> wrote:
>
>> Hi All,
>>
>>
>>
>> I am using Phase Locking Value to measure the connectivity between brain
>> regions at the source level. I learned that the PLV is an average value
>> over trails. In the fieldtrip code, I calculated a frequency model first,
>> then do connectivity analysis with this freq model. The problem is I don’t
>> see trails information in the freq model. So how do I get that phase
>> locking result?
>>
>>
>>
>> Below is my code. This code works, but I am confused about the question
>> above.
>>
>> [image: Inline images 1]
>>
>> Thanks in advance,
>> Yaocong
>>
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>
>
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