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<p>thanks a lot, tzvetan! i seem to have misinterpreted the meaning
of cfg.absnoise. i thought it had the same scale as the
cfg.dip.amplitude.</p>
<p>thanks again and all the best,<br>
thomas<br>
</p>
<br>
<div class="moz-cite-prefix">Am 27.02.2017 um 14:23 schrieb Tzvetan
Popov:<br>
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<blockquote
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Hi Thomas,
<div><br>
</div>
<div>you might have solved it. In case not, I changed :</div>
<div>cfg.relnoise = 5;</div>
<div><br>
</div>
<div>and the amplitude of the baseline signal to</div>
<div><br>
</div>
<div>cfg.dip.amplitude = .1; </div>
<div><br>
</div>
<div>and it worked. You simulate the location at 9 0 6 and it
comes out (NAI) at 90.5 -.5 59.5 (see attached). </div>
<div><br>
</div>
<div>best </div>
<div>tzvetan</div>
<div><br>
</div>
<div><br>
</div>
<div><img apple-width="yes" apple-height="yes" apple-inline="yes"
id="A876BC50-0372-4AA4-AA96-6D4AF786EA5B"
src="cid:part1.B01DD936.0E3FC368@th-ht.de" height="353"
width="927"></div>
<div><br>
</div>
<div>
<div>
<blockquote type="cite">hi,<br>
<br>
i wanted to see whether i can simulate a dipole with the
data provided by the tutorial and use the DICS beamformer to
see where the source gets projected.<br>
<br>
the code i used is in the attached file.<br>
<br>
it expects the data you can download from here: <a
moz-do-not-send="true"
href="ftp://ftp.fieldtriptoolbox.org/pub/fieldtrip/tutorial/beamformer/">ftp://ftp.fieldtriptoolbox.org/pub/fieldtrip/tutorial/beamformer/</a><br>
<br>
in a folder called "beamformer".<br>
<br>
the puzzling thing is that i do not seem to manage to have
it project the sources anywhere near to the original dipole
in the simulation. the center of the head bias come out
nicely if neither baseline correction or NAI calculation is
used. i also checked whether the the coordinate system of
the volume and the grid i generate match. i also checked
whether the chosen dipole shows up at the correct location
when i plot it on the head model.<br>
<br>
so, my question is: what do i not get here? maybe there is
something wrong with my script? maybe ft_dipolesimulate is
not supposed to be used that way?<br>
<br>
i would really appreciate any suggestions.<br>
<br>
best,<br>
thomas<br>
<br>
ps: i also tried with eloreta and a simple dipole fit. the
results look slightly different but not really any better...<br>
<br>
-- <br>
Dr. Thomas Hartmann<br>
<br>
Centre for Cognitive Neuroscience<br>
FB Psychologie<br>
Universität Salzburg<br>
Hellbrunnerstraße 34/II<br>
5020 Salzburg<br>
<br>
Tel: +43 662 8044 5109<br>
Email: <a moz-do-not-send="true"
href="mailto:thomas.hartmann@th-ht.de">thomas.hartmann@th-ht.de</a><br>
<br>
"I am a brain, Watson. The rest of me is a mere appendix. "
(Arthur Conan Doyle)<br>
<br>
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<pre class="moz-signature" cols="72">--
Dr. Thomas Hartmann
Centre for Cognitive Neuroscience
FB Psychologie
Universität Salzburg
Hellbrunnerstraße 34/II
5020 Salzburg
Tel: +43 662 8044 5109
Email: <a class="moz-txt-link-abbreviated" href="mailto:thomas.hartmann@th-ht.de">thomas.hartmann@th-ht.de</a>
"I am a brain, Watson. The rest of me is a mere appendix. " (Arthur Conan Doyle)
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