[Mne_analysis] Maxfilter and PCA-mag-v# projections

[Denis-Alexander Engemann]

        External Email - Use Caution        

First they are discarded as you project to the low rank coordinate system
of maxfilter. After this the SSPs are not valid any longer. Question : do
you take into account bad channels before computing maxfilter? It sounds as
if something is not right with its computation.
Question 2: if your data looks good, do you need maxfilter then in the
first place?

Denis

On Tue 16 Jul 2019 at 15:32, Marijn van Vliet <marijn.vanvliet at aalto.fi>
wrote:

>         External Email - Use Caution
>
> Dear MNE users,
>
> can anyone enlighten me a little about the three 'default' projections
> PCA-mag-v1, PCA-mag-v2 and PCA-mag-v3. Where do they come from and why are
> they
> "discaded" by the maxfiltering process? My mags look pretty clean with
> them
> applied, but after maxfiltering, they look much worse, similar to not
> applying
> the PCA projections.
>
> best,
> Marijn.
>
>
> --
> Marijn van Vliet
> Postdoctoral Researcher
> Department of Neuroscience and Biomedical Engineering
> Aalto University, Finland
>
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