[Mne_analysis] DICS with external channel

[Mikkel Vinding]

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Hi Alex

Thank you for the answer. When I run the SPoC decoder the output is the predicted value for the reference signal. I cannot find the weights of the classifier on the sensors in any of the variables it creates:

            # Make pipeline
            clf = make_pipeline(SPoC(n_components=2, log=True, reg='oas'), Ridge())
            # Define a two fold cross-validation
            cv = KFold(n_splits=2, shuffle=False)
            # Run cross validaton
            y_preds = cross_val_predict(clf, X, y, cv=cv)

Where or how do I find the pattern of the decoder?

Best regards
Mikkel

Mikkel C. Vinding | Ph.D. | Post doc
NatMEG - The National Research Facility for Magnetoencephalography 
Department of Clinical Neuroscience | Karolinska Institutet
171 77 Stockholm | Nobels väg 9, office D313
Phone: +46 8 524 833 33 
Email: mikkel.vinding at ki.se | ki.se
______________________________________
Karolinska Institutet – a medical university

-----Ursprungligt meddelande-----
Från: mne_analysis-bounces at nmr.mgh.harvard.edu [mailto:mne_analysis-bounces at nmr.mgh.harvard.edu] För Alexandre Gramfort
Skickat: den 14 april 2018 17:32
Till: Discussion and support forum for the users of MNE Software <mne_analysis at nmr.mgh.harvard.edu>
Ämne: Re: [Mne_analysis] DICS with external channel

hi,

you may want to give a try to :

https://martinos.org/mne/stable/auto_examples/decoding/plot_decoding_spoc_CMC.html

then I would source localize with a dipole fit the pattern of the decoder.

Alex




On Fri, Apr 13, 2018 at 6:10 PM, Mikkel Vinding <mikkel.vinding at ki.se> wrote:
> Hello
>
>
>
> Do anybody out there have experience with using the DICS beamformer in 
> MNE to find sources coherent with an external signals? E.g. using EMG 
> to finding cortico-muscular coherence as done in the original DICS 
> paper by Gross et al. 2001.
>
>
>
> So far it seems that the DICS beamformer in MNE only take the 
> cross-spectra from MEG sensors, but not able to specify CSD with a 
> non-MEG channel. It seems that in order to calculate the CSD between 
> MEG sensors and external reference I first have to label the external 
> channels as an MEG channel, as mne-time_frequency.csd/csd_epochs will 
> only calculate the CSD matrix between MEG channels. This does however 
> not solve my next problem: that I only need the external reference-MEG 
> CSD for the source localization. Anybody who have a workaround or solution?
>
>
>
> Best regards
>
> Mikkel
>
>
>
> Mikkel C. Vinding | Ph.D. | Post doc
> NatMEG - The National Research Facility for Magnetoencephalography 
> Department of Clinical Neuroscience | Karolinska Institutet
> 171 77 Stockholm | Nobels väg 9, office D313
> Phone: +46 8 524 833 33
> Email: mikkel.vinding at ki.se | ki.se
> ______________________________________
> Karolinska Institutet – a medical university
>
>
>
>
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