[Eeglablist] newtimef freqs output

Katharina Limbach klim366 at aucklanduni.ac.nz
Sun Jul 22 18:37:56 PDT 2012


Dear all,

I have a question regarding the output of the newtimef function.
I am using the following command (input data: 1 participant, 1 condition,
electrode # 67. My sampling rate is 250 Hz and the epochs go from -400 to
996 ms (350 frames)):

[ersp,times,freqs] = newtimef(EEG.data (67,:,:), 350, [-400 996], 250, [1
0.5],'baseline',[NaN], 'freqs', [4 50], 'freqscale', 'log', 'padratio', 4,
'plotphase', 'off', 'plotitc', 'off');

The resulting plot is showing frequencies from 4 to 50 Hz (which is what I
was looking for) but I do not understand the output I get for 'freqs':
The values range from 1.6608914e+04 to 3.0225791e+05.
Shouldn't they simply be in Hz and go from 4 to 50 Hz? Do I have to convert
them to get the correct values or is there something else that I am doing
wrong?

Also my 'times' output is not a vector of output times in ms, but a  47 x
200 martix with complex numbers.


Thanks a lot for your help,
Katharina

-- 
Katharina Limbach
PhD Candidate
Department of Psychology
University of Auckland
Private Bag 92019
Auckland
New Zealand
tel: + 64 9 3737 599 ext 85969
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