Hello,<br><br>I have a question about how channel spectra are calculated. The Plot menu calls pop_prop() which, in turn, appears to call (line 215) Spoectopo.m for the actual calculations using Welch's method (line 277) . Then in line 306+ the calculations occur, maybe rescaled by some kind of RMS value? the plot eventually displayed shows the ordinate label as "Power 10*log10(uv^2/Hz)"<br>
<br>I have tried to duplicate the EEGLAB results using the Matlab Signal Processing toolbox but cannot get the same numbers given by EEGLAB. Rescaling the sptool results by 10*log10(uv^2)/Hz) does not seem to help either.<br>
<br>Can someone please help me clear this up, or point out what I am missing? I need to know which is the correct set of data.<br><br>Thank you <br>Don<br><br><br>-- <br>Don Scott<br><br>(864) 415 - 1795<br>Dscott8201@Gmail.Com<br>
<div><br></div><div><span style="font-family:arial,sans-serif"><i><span style="font-size:x-small">"Although the universe doesn't have an end, it had a beginning in the Big Bang. One might ask what is before that, but the answer is that there is nowhere before the Big Bang, just as there is nowhere south of the South Pole."</span></i></span><div>
<font face="arial, sans-serif"><i><span style="font-size:x-small"><br></span></i></font></div><div><font face="arial, sans-serif"><i><span style="font-size:x-small">--- Stephen Hawking</span></i></font></div></div><br>