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

[Alexandre Gramfort]

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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