<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta content="text/html;charset=ISO-8859-7" http-equiv="Content-Type">
</head>
<body bgcolor="#ffffff" text="#000000">
No this is normal. The del2map function is not optimized to work on
continuous data. You could easily look at it to introduce a speed
factor of more than 20 or more probably (I guess processing a dataset
of 190 000 should not take more than one hour). The computation of the
laplacian is really fast. It is the interpolation which is slow. I have
entered an enhancement suggestion in our Bugzilla system.<br>
<br>
<a class="moz-txt-link-freetext" href="https://sccn.ucsd.edu/eeglab/bugzilla/show_bug.cgi?id=222">https://sccn.ucsd.edu/eeglab/bugzilla/show_bug.cgi?id=222</a><br>
<br>
If you wish, just use the function eeg_interp which can compute faster
interpolation (attached) and add some code to compute the laplacian<br>
<br>
Best,<br>
<br>
Arno<br>
<br>
Maria L. Stavrinou wrote:
<blockquote cite="mid:002701c75ccf$bf155360$a6a78c96@MARIASTABLE"
type="cite">
<meta http-equiv="Content-Type" content="text/html; ">
<meta content="MSHTML 6.00.2900.3059" name="GENERATOR">
<style></style>
<div><font face="Arial" size="2">Dear EEGLab creators and users</font></div>
<div><font face="Arial" size="2">We are trying to use the laplacian
introduced into EEGLAB (the del2map function). We use it on 60 channels
on continuous data (a typical dataset is about 190000 datapoints per
channel, and it takes approximately 1-2 days. That is normal, or we
might be doing something wrong?</font></div>
<div> </div>
<div><font face="Arial" size="2">Best regards, </font></div>
<div><font face="Arial" size="2">Maria</font></div>
<div> </div>
<div><font face="Arial" size="2">Maria L. Stavrinou PhD</font></div>
<div><font face="Arial" size="2">Biosignal Processing Laboratory, <br>
Department of Medical Physics,<br>
School of Medicine,<br>
University of Patras, <br>
Rio Campus, 26500, <br>
Greece<br>
tel. lab. 0030-2610-966115</font></div>
<div> </div>
<div><font face="Arial" size="2">web page: <br>
<a moz-do-not-send="true"
href="http://nucleus.med.upatras.gr/%7Emaria/hello.htm">http://nucleus.med.upatras.gr/~maria/hello.htm</a></font></div>
<div> </div>
<font face="Arial" size="2"></font>
<div><font face="Arial" size="2"><br>
<br>
</font><br>
</div>
<div> </div>
<font face="Arial" size="2"></font>
<div><font face="Arial" size="2"> <br>
</font></div>
<pre wrap="">
<hr size="4" width="90%">
_______________________________________________
eeglablist mailing list <a class="moz-txt-link-abbreviated" href="mailto:eeglablist@sccn.ucsd.edu">eeglablist@sccn.ucsd.edu</a>
Eeglablist page: <a class="moz-txt-link-freetext" href="http://sccn.ucsd.edu/eeglab/eeglabmail.html">http://sccn.ucsd.edu/eeglab/eeglabmail.html</a>
To unsubscribe, send an empty email to <a class="moz-txt-link-abbreviated" href="mailto:eeglablist-unsubscribe@sccn.ucsd.edu">eeglablist-unsubscribe@sccn.ucsd.edu</a></pre>
</blockquote>
<br>
</body>
</html>