[Eeglablist] Analysis parameters

[Makoto Miyakoshi]

Dear Lorna,

Wavelet transform at the STUDY level is performed by newtimef(), so it
basically accepts optional inputs for newtimef(). If you want to specify
the window size, there are two ways.
1. Use option 'winsize'; note it conflicts with other options so check out
which overwrites which.
2. Compute it in this way: your lowest frequency x number of cycles. For
example, if 'freqs', [3 128], 'cycle', [3 0.8], then 3 Hz = 333 ms per
cycle and there will be 3 cycles at 3 Hz, which means your window size is
approximately 333 ms x 3 cycles = 999 ms. If 'freqs', [2 128], 'cycle', [3
0.8], your window size will be 1500 ms; if 'freqs', [4 128], 'cycle', [3
0.8], it will be 750 ms.

Makoto


2013/7/31 Lorna C Quandt <lorna.quandt at temple.edu>

> Dear Makato,
>
> Thank you for your reply. Can you tell me in a bit more detail how look at
> the log output in the MATLAB command window? I am navigating around the
> STUDY parameters in the command window but I do not see parameters for
> window size. How is that parameter labeled, and where can I find it?
>
> Many thanks.
>
> Lorna
>
>
> On Mon, Jul 22, 2013 at 5:20 PM, Makoto Miyakoshi <mmiyakoshi at ucsd.edu>wrote:
>
>> Dear Lorna,
>>
>> Please check out the log output in the Matlab command window. It says
>> window size. It also shows how many windows were used (which can be
>> specified with timesout, default 200) so you should be able to compute the
>> overlap of windows too.
>>
>> Makoto
>>
>>
>> 2013/7/22 Lorna C Quandt <lorna.quandt at temple.edu>
>>
>>> Hello all,
>>>
>>> I have a question about an analysis I have already performed. I did a
>>> ERSP analysis with the following input, entered in the GUI when I was
>>> precomputing channel data:
>>>
>>> 'cycles' [4 0.1]  'nfreqs' 100 'freqs' [5 40]  'baseline' [-2999 -2000]
>>>  'padratio' 4
>>>
>>> I did not change any other input parameters. However I am not sure of
>>> some of the parameters that were used. I would like to know the length of
>>> the sliding window used to compute the analysis, and how much overlap there
>>> was. Any advice or information about how to identify these parameters is
>>> welcome.
>>>
>>> Many thanks,
>>> Lorna Quandt
>>>
>>> -------
>>> Lorna C. Quandt
>>> Doctoral Candidate
>>> Brain and Cognitive Sciences
>>> Department of Psychology
>>> Temple University
>>>
>>> _______________________________________________
>>> Eeglablist page: http://sccn.ucsd.edu/eeglab/eeglabmail.html
>>> To unsubscribe, send an empty email to
>>> eeglablist-unsubscribe at sccn.ucsd.edu
>>> For digest mode, send an email with the subject "set digest mime" to
>>> eeglablist-request at sccn.ucsd.edu
>>>
>>
>>
>>
>> --
>> 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
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://sccn.ucsd.edu/pipermail/eeglablist/attachments/20130731/810b9d68/attachment.html>