[Eeglablist] Time- frequency analysis

[Makoto Miyakoshi]

Dear Iryna,

> When I do disable baseline subtraction, then it works fine

Ok so the issue is in using the baseline option.

> e.g., [0 30000], I get the foll0wing error message:

Let's try this together.
If your sliding window length is 500 datapoint long, try

[500  30000]

It should work. It may also work

[250 30000]

or

[251 30000]

I think at least one of the above parameter choices should work, if I am
guessing the cause of the problem correctly. Basically, your time-freq data
will start from [250] or [251] which is the half length of your sliding
window and no data before that.

Makoto


On Mon, Jul 30, 2018 at 7:36 AM Gumenchuk, Iryna <Iryna_Gumenchuk at nymc.edu>
wrote:

> Thank you for your response!
> Yes, this large value is for continuous data, and I want to subtract the
> baseline and then apply time - frequency analysis on continuous data. When
> I do disable baseline subtraction, then it works fine, but I need
> specifically to subtract the baseline.
> Best,
> Iryna
> ________________________________
> From: Makoto Miyakoshi [mmiyakoshi at ucsd.edu]
> Sent: Friday, July 27, 2018 9:28 PM
> To: Gumenchuk, Iryna
> Cc: EEGLAB List
> Subject: Re: [Eeglablist] Time- frequency analysis
>
> Dear Iryna,
>
> > When I use the eeglab, [0 1095000] is the value that is selected by
> default in the time-frequency dialog (pop_newtimef()).
>
> Hmm that seems a very large value, whatever it is. What is that value? My
> guess is you tried to apply time-frequency analysis on continuous data, but
> is that what you wanted to do?
>
> Also, try 'baseline', NaN to disable baseline subtraction. What do you see?
>
> Makoto
>
> On Mon, Jul 23, 2018 at 1:53 PM Gumenchuk, Iryna <Iryna_Gumenchuk at nymc.edu
> <mailto:Iryna_Gumenchuk at nymc.edu>> wrote:
> When I use the eeglab, [0 1095000] is the value that is selected by
> default in the time-frequency dialog (pop_newtimef()). In the
> case of my continuous data, when I change select values for my baseline,
> e.g., [0 30000], I get the foll0wing error message:
> There are no sample points found in the default baseline. This may happen
> even though data time limits overlap with the baseline period (because of
> the time-freq. window width). Either disable the baseline, change the
> baseline limits.
> Please advice!
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> --
> Makoto Miyakoshi
> Swartz Center for Computational Neuroscience
> Institute for Neural Computation, University of California San Diego
>


-- 
Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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