[Mne_analysis] ICA mne python - combining mags and grads

[Denis-Alexander Engemann]

Hi Ana,

it is indeed mainly for simplifying things and reducing the number of
solutions and files to handle. But nothing speaks against fitting separate
ICA solutions.

Denis

On Thu, Jan 19, 2017 at 4:12 PM Alexandre Gramfort <
alexandre.gramfort at telecom-paristech.fr> wrote:

> hi Ana,
>
> yes we combine grads and mags but we put them on the same scale
> by whitening before feeding them to the ICA function. So AFAIK this
> works quite well.
>
> HTH
> Alex
>
> On Thu, Jan 19, 2017 at 1:28 PM, A. Klimovich-Smith <ak798 at cam.ac.uk>
> wrote:
> > Hello everyone,
> >
> > I have an ICA-related question for the mne-python community. This time
> > more theoretically oriented.
> >
> > All examples and tutorials on the mne python pages for ICA artefact
> > rejection procedures combine both magnetometers and gradiometers
> > together when performing ICA and finding artefact components. What would
> > be an argument for combining all sensors like this as opposed to doing
> > ICA on grads and mags separately (which seems to be a recommended way in
> > other packages)? Is this simply for saving computational time?
> >
> > Thanks for your advice!
> >
> > Ana
> >
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