[Eeglablist] ERSP outputs

[Erika Nyhus]

Hi Makoto,


I am confused because when I run std_precomp it says the output frequencies are 3-125 Hz, 100 frequencies and the time range is -240-1440,  200 timepoints, but when I look at the ersp data after plotting the output frequencies are from 3-49 Hz,  75 frequencies and the time range is -100-1440, 183 timepoints.


Erika Nyhus, Ph.D.
Department of Psychology and Program in Neuroscience

6900 College Station
Bowdoin College
Brunswick, ME 04011
________________________________
From: Makoto Miyakoshi <mmiyakoshi at ucsd.edu>
Sent: Friday, July 12, 2019 11:57:55 PM
To: Erika Nyhus
Cc: EEGLAB List
Subject: Re: ERSP outputs

Dear Erika,

Basic facts about the parameters can be found here.
https://sccn.ucsd.edu/mediawiki/images/a/a6/C2_A3_Time-frequencyDecAndAdvancedICAPracticum_updateJan2017.pdf<https://nam02.safelinks.protection.outlook.com/?url=https%3A%2F%2Fsccn.ucsd.edu%2Fmediawiki%2Fimages%2Fa%2Fa6%2FC2_A3_Time-frequencyDecAndAdvancedICAPracticum_updateJan2017.pdf&data=02%7C01%7Cenyhus%40bowdoin.edu%7Cb8d6248ec2074b17355908d707466229%7C984e32e5f98a4600aa3227c3f948abe3%7C1%7C1%7C636985871232653522&sdata=aqeS9fx60AYuJ0445EnbfuYOYSTjdOH9QS5YDYapCjY%3D&reserved=0>

However, 'nfreqs', 100 generated 75 frequencies does not make sense. Are you sure 'nfreqs' was properly recognized when you performed the calculation? I have never heard of it.

Makoto

On Thu, Jul 11, 2019 at 11:04 AM Erika Nyhus <enyhus at bowdoin.edu<mailto:enyhus at bowdoin.edu>> wrote:

I am confused about the outputs for ERSPs in std_precomp.  My data was epoch from -800-2000 ms and the only inputs I set for erspparams was 'cycles' [3 .8], 'nfreqs' 100, 'ntimesout' 200.  I am not sure why the output frequencies are from 3-49 Hz,  75 frequencies and why the time range is -100-1440, 183 timepoints.


Erika Nyhus, Ph.D.
Department of Psychology and Program in Neuroscience

6900 College Station
Bowdoin College
Brunswick, ME 04011


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