[Eeglablist] newtimef, 'powbase' problem

[Makoto Miyakoshi]

Dear Arno,

This is another technical question and I would like to draw your
attention to this.

Makoto

2012/8/10 Christian Scharinger <c.scharinger at gmx.net>:
> Dear eeglab users,
>
> never running out of questions and problems, I have another one:
> In order to get more familiar with the newtimef function and the
> possibility to feed in an external baseline ('powbase') I tried the
> following:
>
> 1) Calculate the ERSP for one experimental condition:
> [ersp_data,ersp_itc, ersp_powbase,ersp_times,ersp_freqs] =
> newtimef(EEG.data(channel,:,:), EEG.pnts, [EEG.xmin EEG.xmax]*1000,
> EEG.srate, 'cycles', [0], 'itctype', 'phasecoher', 'detrend', 'off',
> 'rmerp', 'off', 'padratio', [4], 'freqs', [2 22], 'nfreqs', [20],
> 'freqscale', 'linear', 'verbose', 'on', 'baseline', [0], 'powbase', NaN,
> 'plotitc', 'off');
>
> This works well.
>
> 2) Do the same calculation but this time using the baseline calculated
> under 1) (ersp_powbase) as input for the 'powbase' argument.
> [ersp_data2,ersp_itc2, ersp_powbase2,ersp_times2,ersp_freqs2] =
> newtimef(EEG.data(channel,:,:), EEG.pnts, [EEG.xmin EEG.xmax]*1000,
> EEG.srate, 'cycles', [0], 'itctype', 'phasecoher', 'detrend', 'off',
> 'rmerp', 'off', 'padratio', [4], 'freqs', [2 22], 'nfreqs', [20],
> 'freqscale', 'linear', 'verbose', 'on', 'plotitc', 'off', 'powbase',
> ersp_powbase);
>
> I expected the data saved in ersp_powbase under 1) is exactly what is
> required as input for the 'powbase' argument. So using this data
> structure under 2) should give me exactly the same figure as in 1).
> Unfortunately it does not. All what happens is a serious crash of my
> matlab environment when executing the code under 2).
>
> Maybe someone has any suggestions what could be wrong with my code under 2)?
>
> Best,
> Christian
>
>
> --
> Christian Scharinger, M.A.
>
> Knowledge Media Research Center (KMRC)
> Schleichstraße 6 | 72076 Tuebingen
>
> Phone: +49 (0)7071 979-360
> Internet: http://www.iwm-kmrc.de/c.scharinger
> E-Mail: c.scharinger at iwm-kmrc.de
>
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-- 
Makoto Miyakoshi
JSPS Postdoctral Fellow for Research Abroad
Swartz Center for Computational Neuroscience
Institute for Neural Computation, University of California San Diego