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Dear Maria,<br>
<blockquote type="cite"
cite="mid6.0.3.0.1.20041209095207.01b43898@mail.unibo.it"><font
size="3">I've just started to use EEGlab 4.511 on a Matlab 7.0. I'm
interested in
extract from continuous EEG data (PSG) the power spectrum of
different bands frequencies (that I would like define by myself) from a
specific channel, and then to have this data in a format (.txt is
ok) that allow me to export them into another software for
statistical analysis. I've already imported my raw EEG (from an EDF
format) into EEGlab an I've done a visual artifacts rejection, but I
have
some problem in finding a function that allows to define spectral
analysis features [e.g. frequency band-withs, spectral resolution
(window
on analysis, epoch lengh), how to add a cosine window, how to define
the
ovelapping rate]. I found in EEGlablist message archive that it is
possible to do something similar by"<i>phasecohe</i>r"
function...is it in EEGlab or in Matlab?<br>
</font></blockquote>
No, the best function is "timef" assuming you have data epochs. If you
do not have data epoch, use directly "fft" or "specgram" from the
command line. All of these functions return a range of frequency so you
then have to select specific rows corresponding to specific
frequencies, the export these in a text file (save -txt filename
variablename).<br>
<br>
Arno<br>
<div class="moz-signature">-- <br>
<br>
<b><font face="Arial,Helvetica"><font size="+1">Arnaud Delorme, Ph.D.</font></font></b>
<br>
<font face="Arial,Helvetica"><font size="+1"><font color="#3333ff">Swartz
Center for Computational Neuroscience,</font> <font color="#3333ff">INC,
University of San Diego California</font></font></font>
<br>
La Jolla, CA92093-0961, USA
<p><font face="Arial,Helvetica"><b>Tel</b> :<i>(+1)-858-458-1927 ext 15</i></font>
<br>
<font face="Arial,Helvetica"><b>Fax</b> :<i>(+1)-858-458-1847</i></font>
<br>
<font face="Arial,Helvetica"><b>Web page</b>: <a
href="http://www.sccn.ucsd.edu/%7Earno">sccn.ucsd.edu/~arno</a></font>
<br>
<font face="Arial,Helvetica"><b>To think upon</b>:</font></p>
<blockquote><dt><font face="Arial,Helvetica"> The traveler has reached
the end of the journey! In the freedom of the infinite he is free from
all sorrows, the fetters that bound him are thrown away, and the
burning fever of life is no more.
<font size="-5"><br>
<br>
</font></font></dt>
<dd><font face="Arial,Helvetica"><i>Dhammapada 90</i></font></dd>
</blockquote>
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