[Mne_analysis] Width of the transition band when applying a Hilbert transform

[Alexandre Gramfort]

hi J,

may I ask what you are aiming to do afterwards with these filtered data?

Alex

On Sat, Jan 20, 2018 at 11:45 PM, jeanne lusiot <jeanne.lusiot at gmail.com> wrote:
> Hello,
>
> My question relates more to a signal processing issue, so apologies in
> advance if it is not appropriate for the forum.
> I am currently doing an exploratory EEG power analysis  using the
> filter-Hilbert transform and would appreciate some advice on the
> parameterization of the band-pass filter. For each epoch and time step, I
> want to compute the power of each frequency from 1 to 30 Hz (in steps of 1).
> I am thus bandpass filtering the data prior to the application of the
> Hilbert transform (so I bandpass filter from 1 to 2Hz, then from 2 to 3hz
> etc. ).
> Mne's FIR filter implemented via mne.filter.filter_data is perfect for this
> purpose, but I am wondering if I should use the default automatic width of
> transition band, or whether i should set  l_trans_bandwidth and
> h_trans_bandwidth to some fixed value x across all frequency bands. If so,
> how should I set x to achieve a good balance between frequency/timing
> precision ?
>
> Best,
> J.
>
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