[Eeglablist] plotting channel spectra and maps precision question

[Makoto Miyakoshi]

Dear Ida,

Use (enter) the option 'freqfac', 8 or around.

Makoto


2013/10/16 Ida M <ida.miokovic at gmail.com>

> Dear List,
>
> I have one question regarding precision channel spectra and maps plot - I
> am interested to see presence of frequencies below 1 Hz in non-EEG data.
> Data was filtered with 0.1 Hz highpass filter.
>
> When using EEGLAB Plot --> Channel Spectra and Maps in pop up window I set
> up 100% data to sample (around 500.000 ms of record), plotting freq range
> from 0 to 1 Hz, but precision of the plot is pretty rough. Is there any way
> to use code to use to obtain more fine lines in this plot which is now
> composed of straight lines? To somehow define the "step" of plotting. I
> suppose it is influenced by the number of data available also...
>
> The main reason of using this option in EEGLAB is to somehow get the info
> of most dominant frequency at one certain channel recorded which represent
> breathing of a subject.
>
> Thank you very much for your help.
>
> Greetings
>
> Ida
>
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-- 
Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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