[FieldTrip] ICA before beamforming -> change in gradiometer -> workaround?

[Johanna Zumer]

Dear Frederic,

It is possible to keep the .grad structure, with updated .grad.tra, by
including, in the third argument to ft_rejectcomponent, the original data
structure, like this:

comp=ft_componentanalysis(cfg1,rawdata)

cleanedraw=ft_rejectcomponent(cfg2,comp,rawdata);

Best,
Johanna

2012/5/7 Frederic Roux <fredericroux at hotmail.de>

>  Dear all,
>
> I am using ICA prior to beamforming for artefact cleaning (EOG & ECG).
>
> After running ft_componentanalysis I noticed that the gradiometer structure
> is removed from the data, which is required by ft_sourceanalysis.
>
> In a prior post I read that one could just add the grad structure from a
> previous version
> of the data before the ICA cleaning.
>
> http://mailman.science.ru.nl/pipermail/fieldtrip/2012-March/004877.html
>
> Can anyone tell me if this is the best solution, or if there is any other
> strategies out there?
>
> Best,
> Fred
>
> --
> Frédéric Roux, PhD student
> Department of Neurophysiology
> Max Planck Institute for Brain Research
> D-60529 Frankfurt am Main
> Frederic.Roux at brain.mpg.de
> +49(0)69630183225
>
>
>
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