<div dir="ltr"><div><div>Hello Alex,<br><br></div>Unfortunately it doesn't. I had already checked it, but all it says is "<span class="">The spectral densities can be estimated using</span><span class=""> ... a continuous wavelet transform using</span>
<span class="">Morlet wavelets." Using njobs=1, the calculation of the spectrum density is in _epoch_spectral_connectivity (which is called on line 975) and more specifically here:<br><br><a href="https://github.com/mne-tools/mne-python/blob/master/mne/connectivity/spectral.py#L370">https://github.com/mne-tools/mne-python/blob/master/mne/connectivity/spectral.py#L370</a><br><br></span></div><div><span class="">My data is an stc so I think the code goes into "</span><span class="">if</span> <span class="">isinstance</span>(this_data, _BaseSourceEstimate):", but when the "partial" function is called, it gets a little blurry.<br><br></div><div>Thanks,<br></div><div>Christos<br></div><span class=""></span></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Jun 10, 2015 at 4:05 PM, Alexandre Gramfort <span dir="ltr"><<a href="mailto:alexandre.gramfort@telecom-paristech.fr" target="_blank">alexandre.gramfort@telecom-paristech.fr</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">hi Christos,<br>
<br>
does the doc of the function helps?<br>
<br>
<a href="https://github.com/mne-tools/mne-python/blob/master/mne/connectivity/spectral.py#L515" target="_blank">https://github.com/mne-tools/mne-python/blob/master/mne/connectivity/spectral.py#L515</a><br>
<br>
Alex<br>
<div><div class="h5"><br>
On Wed, Jun 10, 2015 at 10:12 AM, Christos Michas <<a href="mailto:cmichas@bu.edu">cmichas@bu.edu</a>> wrote:<br>
> Dear MNE-ers,<br>
><br>
> I used the function mne.connectivity.spectral_connectivity to compute the<br>
> coherence of my stcs using wavelet transform. Now I am trying to interpret<br>
> the results I got and to do so, I want to first verify what formula is used<br>
> by MNE to compute the coherence. Suppose we have two signals x(t) and y(t)<br>
> and that the wavelet transform is using a wavelet w(t)=w_m((t-b)/a) where a<br>
> is the scaling parameter, b the time offset parameter and w_m the mother<br>
> wavelet. What will the cross-spectral density of x and y be? Is it<br>
><br>
> S_xy(a,b) = {w(t)[ {x(τ)y(t+τ)dτ ]dt<br>
><br>
> Sorry for the awkward notation, suppose { is an integral and _ is a<br>
> subscript...<br>
> Thank you very much for your help.<br>
><br>
> Regards,<br>
> Christos<br>
><br>
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