[Mne_analysis] resampling and artefect rejection

Alexandre Gramfort alexandre.gramfort at m4x.org
Fri Nov 2 01:45:07 EDT 2018
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hi,

ICA is a purely spatial operations so if you identified components
that capture your artifacts with resampled data you're fine. Note
that to avoid resampling you can just use the decim parameter
that will omit certain samples to speed up ICA estimation.

HTH
Alex

On Fri, Nov 2, 2018 at 6:35 AM Veda Hung <vedahung1116 at gmail.com> wrote:
>
>         External Email - Use Caution
>
> Hello,
>
> I have a general question regarding sampling rate and artefect rejection with ICA. I used to resample my MEG data from 1000 Hz to 250 Hz and use ICA to identify heart beat and eye blinks with ICA and remove those unwanted components. For new analysis on the same data set, I use a new resampling rate (500 Hz). I wonder whether I should redo ICA for the 500Hz-sampled data or I can still use the ICA components obtained from data of 250Hz.
>
> Thanks.
> Veda
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