<div dir="ltr">Hi Arno,<br><br>Thanks for the info - I think a lot of us have been wondering about this one ( I actually asked pretty much the same question before your response but it hasn't showed up in the archive yet). However, the trouble that I am still having is that I'm wondering what is the best way to approach this data for (parametric) statistical analysis. That is, the default output is in dB which is on a logarithmic scale and thus not appropriate for parametric stats. There is the possibility of nonparametric tests, but my options may be more limited than those of parametric techniques (plus they seem to be somewhat frowned upon in some circles). <br>
<br>Is using the " 'baseline', NaN " option the solution to this problem? I'm interested in comparing event-related changes in spectral amplitude - will the matrix for a baseline-intact ERSP array provide me with these values? If not, do you have any recommendations for how to go about converting dB ERSP matrices to those which would be amenable to parametric statistics?<br>
<br>Many thanks!!<br><br>Zach Moran<br><br>Grad Student<br>University of California-Los Angeles<br>Lab for Clinical Affective Psychophysiology<br><br><br><div class="gmail_quote">On Thu, Sep 11, 2008 at 7:21 AM, arno delorme <span dir="ltr"><<a href="mailto:arno@ucsd.edu">arno@ucsd.edu</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Dear Maria,<br>
<br>
no there is no way to plot microV (since this is a spectral<br>
decomposition). To plot the time-frequency decomposition without<br>
removing the baseline, try entering 'baseline', NaN.<br>
<br>
Hope this helps,<br>
<font color="#888888"><br>
Arno<br>
</font><div><div></div><div class="Wj3C7c"><br>
On 14 juil. 08, at 10:22, Maria Kharitonova wrote:<br>
<br>
> Hello,<br>
><br>
> I'm learning how to make time-frequency plots using EEGLAB. I was able<br>
> to make the plots using the timef() function. However, I noticed that<br>
> the scale is in dB, and not in microvolts. Is there any way to make<br>
> the ERSP plots using the microV (and not dB) scale? I searched the<br>
> help files and the archives but could not find anything.<br>
><br>
> Thank you in advance!<br>
><br>
> Maria Kharitonova<br>
><br>
><br>
> **********************************<br>
> Maria Kharitonova, M.A.<br>
> Department of Psychology<br>
> University of Colorado, Boulder<br>
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