Dear Marco,
The filtering is done by a discrete cosine set so its frequency resolution is the inverse of the time window length. In your case you'll get either just mean subtraction or 2Hz high-pass (you need to look in the code to be sure). If you want to have a really fine-tuned cutoff you should filter continuous data in preprocessing and leave the filters open for the inversion.
Best,
Vladimir
On 30 Nov 2012, at 11:45, Marco Buiatti <[log in to unmask]> wrote:
> Dear SPM masters,
>
> When performing eeg source inversion, I have the possibility of
> setting a high-pass filter of 1Hz.
>
> What kind of filter is it? Is it dangerous to apply it to e.g. a 500
> ms time window (as it would be the case for the typical high-pass
> filters used in eeg pre-processing)?
>
> Thanks,
>
> Marco
>
> --
> Marco Buiatti, PhD
>
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