[FieldTrip] Diagonal values for wpli in ft_connectivityanalysis

[Schoffelen, J.M. (Jan Mathijs)]

Dear Wanze,

I don’t know what type of data you put into the algorithm, so it’s a bit ‘koffiedik’ kijken, as we say in Dutch. I’d suggest that you start by reading the code, and see whether you understand what causes your ‘issue’.

Best wishes,
Jan-Mathijs


J.M.Schoffelen, MD PhD
Senior Researcher, VIDI-fellow - PI, language in interaction
Telephone: +31-24-3614793
Physical location: room 00.028
Donders Centre for Cognitive Neuroimaging, Nijmegen, The Netherlands

On 7 Nov 2017, at 16:33, Xie Wanze <xiew1202 at gmail.com<mailto:xiew1202 at gmail.com>> wrote:

Dear all,
I have the diagonal values unequal to 0 or 1 in the output matrix from the ft_connectivityanalysis using 'wpli'.  These diagonal values are even not equal to each other.  The diagonal values are the same (0s or Infinite) by using 'coh' or 'coh' & cfg.complex = 'imag'.

I never used the diagonal values in my later analysis, and I always changed them to 0s, but I am still curious and confused about why this happened to the method of 'wpli'.

Does anyone ever meet this issue?

Thanks.

Wanze
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