<div dir="ltr">Hi,<div>I'm also trying to do similar analysis.I was thinking of just exporting the data to MATLAB and calculate ERS my self using fft algorithm.</div><div>But I would be great to do it through eeglab.</div><div>Also I need to plot topographic maps representing ERS amplitudes, which I have no idea how to do in eeglab.</div><div>I appreciate any help,</div><div>Thanks,</div><div>Maryam </div></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Mar 19, 2015 at 4:27 PM, Makoto Miyakoshi <span dir="ltr"><<a href="mailto:mmiyakoshi@ucsd.edu" target="_blank">mmiyakoshi@ucsd.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Dear Arno,<div><br></div><div>This is a question about how to recover/convert STUDY ERSP using baseline values. I've never done it before. Could you help us please?</div><div><br></div><div>Makoto</div><div class="gmail_extra"><div><div class="h5"><br><div class="gmail_quote">On Wed, Mar 18, 2015 at 2:24 PM, Michal Vavrecka <span dir="ltr"><<a href="mailto:vavrecka@fel.cvut.cz" target="_blank">vavrecka@fel.cvut.cz</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hello,<br>
<br>
I am using the eeglab for hemispheric assymetry calculation, so I need to create custom processing pipeline for the output of std_precompute. I know that the ERSP data are stored in *.erspdat file, that contains spectral power for each channel and also baseline (chanxx_ersp and chan_erspbase respectively). The problem is, that each matrix (or vector and matrix) are in different unit, so I do not know how to substract baseline and visualize results outside eeglab. The ersp matrix stores spectral values that range about [-8;8] that resembles spectral power in dB. Suprisingly the baseline values are stored in different units, ranging between 0 100. Can you write me how to convert baseline values to substract them from ersp data? Do I need to log the baseline or there is different transformation?<br>
<br>
Thank you for your help<br>
<br>
<br>
<br>
Michal<br>
<br>
Michal Vavrecka<br>
assistant professor<br>
Karlovo nam. 13<br>
Praha<br>
mail: <a href="mailto:vavrecka@fel.cvut.cz" target="_blank">vavrecka@fel.cvut.cz</a><br>
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<br>
<br>
<br>
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</blockquote></div><br><br clear="all"><div><br></div></div></div><span class="HOEnZb"><font color="#888888">-- <br><div><div dir="ltr">Makoto Miyakoshi<br>Swartz Center for Computational Neuroscience<br>Institute for Neural Computation, University of California San Diego<br></div></div>
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