[Eeglablist] minfreq, newcrossf

Makoto Miyakoshi mmiyakoshi at ucsd.edu
Tue Feb 18 14:53:47 PST 2014


Dear Joana,

ERSP/ITC data length = from (epoch start + window width/2) to (epoch end -
window width/2)
Window width = 1 (sec)/min freq (Hz) x min cycles
Temporal resolution = ERSP/ITC data length/timesout
Freq range = ’freqs’, [min max]
Freq resolution = freq range/nfreqs

For short description, see slide 21 of this pdf
http://sccn.ucsd.edu/mediawiki/images/1/19/C2_A3_Time-frequencyDecAndAdvancedICAPracticum.pdf

For detailed (and better) explanation, see Tim Mullen's excellent slides
from here
http://sccn.ucsd.edu/mediawiki/images/6/68/PlenaryDay1_EEGLAB_TFAnalysis.pdf

Makoto


2014-02-11 10:30 GMT-08:00 Joana Paiva <joanaispaiva at gmail.com>:

> Hi,
>
>
> I would like to know what is the relation between minfreq, the number of
> data points, cycles and frequency sampling using wavelets analysis in
> eeglab function newcrossf()? I would like to obtain phase coherence between
> two channels using wavelets for a frequency range between 4-70 Hz and time
> limits [-500 0] ms. Data epochs are defined between [-1000 0] ms range.
> What are the wavelet parameters more appropriate for this analysis?
>
> --
> *Joana Paiva*
> MSc Student
> Biomedical Engineering
>
> Faculty of Sciences and Technology - University of Coimbra
>
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-- 
Makoto Miyakoshi
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego
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