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

[Denis-Alexander Engemann]

Yes, this is the example I had in mind.

On Mon, Jan 22, 2018 at 9:31 PM Alexandre Gramfort <
alexandre.gramfort at inria.fr> wrote:

> hi,
>
> how about starting with something like this:
>
>
> http://martinos.org/mne/stable/auto_examples/time_frequency/plot_time_frequency_global_field_power.html
>
> ?
>
> HTH
> Alex
>
>
> On Mon, Jan 22, 2018 at 9:27 PM, jeanne lusiot <jeanne.lusiot at gmail.com>
> wrote:
> > Hello,
> > I mainly want to estimate theta, alpha, and beta power in the 200-600ms
> > postimulus window. Note that I could bandpass filter the data in the
> > corresponding ranges (e.g., theta: 4-7).
> >
> >
> >
> >
> >
> > averaged power in a specific temporal window (200 600ms poststimulus)
> for
> > theta bvand, alpha band, and beta band.
> >
> > On Mon, Jan 22, 2018 at 2:17 PM, Alexandre Gramfort
> > <alexandre.gramfort at inria.fr> wrote:
> >>
> >> 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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