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<DIV dir=ltr align=left><SPAN class=532095619-28082006><FONT face=Arial
color=#0000ff size=2>Hi, Erin. I am replying to the EEGLAB list,
too, so that others are aware of the situation. The problem with
EEGLAB not reading event codes was related to the way the version of EEGLAB
I was using at the time read the event channel. I believe it affected only
data files created with mk2 ActiveTwo systems. I am not sure if it was
fixed in a later release version of EEGLAB. The mk1 / mk2 state of the
ActiveTwo system is encoded in the most significant bit of the most significant
byte of the status channel. In two's complement notation, this results in
a negative number. The version of EEGLAB I was using at the
time assumed that the Status channel should always contain positive numbers, so
it ignored all of the events, given that they were all encoded as negative
numbers. One work around would be to ignore the event channel on loading
data and use the menu functions to decode the events in the Status channel after
the data have been loaded. I seem to recall that this did resolve the
problem for us in December, although I am not sure if we had to download some
new BioSig code to make that work. I must refer you to the EEGLAB list for
more specific suggestions.</FONT></SPAN></DIV>
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<P><FONT size=2>Lloyd Smith<BR>Owner<BR>Cortech Solutions, LLC<BR><BR>321 N.
Front Street, Suite 113<BR>Wilmington, NC 28401 USA<BR>Office:
910-362-1143<BR>Mobile: 910-431-2811<BR>Fax: 910-362-1147<BR>E-mail:
LSmith@cortechsolutions.com<BR>Web: www.cortechsolutions.com<BR><BR></FONT></P>
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<FONT face=Tahoma size=2><B>From:</B> Erin McMullen Jonaitis
[mailto:mcturtle@gmail.com] <BR><B>Sent:</B> Thursday, August 24, 2006 3:15
PM<BR><B>To:</B> Lloyd Smith<BR><B>Subject:</B> EEGLab, BioSemi, and event
markers<BR></FONT><BR></DIV>
<DIV></DIV>Hi!<BR><BR>I'm a graduate student having a problem with
EEGLab. I looked through the EEGLab mailing list archives and saw that
you had a very similar problem last December, but did not see a solution
posted. Basically, the software isn't recognizing the event channel in
my intact datafiles that read fine in BESA. Were you ever able to solve
the problem? If so, would you mind giving me some
pointers?<BR><BR>Thanks very much in advance.<BR><BR>Erin McMullen
Jonaitis<BR></BLOCKQUOTE></BODY></HTML>