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<div align="left"><font face="Arial" size="2"><span style="font-size:10pt">Dear FTers,</span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt">I have a query regarding the sliceinterp function. I am trying to plot the
sources of beta power changes. The source activities are the result of a
comparison of left and right hand movement conditions, hence they have a
mirror reversed distribution and amplitude, ranging from say -15 in one
hemisphere to +15 in the opposite hemisphere. </span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt"><br />
</span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt">In order to clip the displayed source activities to say [-10 -15] in one
hemisphere and [10 15] in the other (and create opacity maps) I thought I
could use cfg.clipsym = ‘yes’ (and cfg.maskclipsym).</span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt">For instance:</span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt">cfg = [];</span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt">cfg.funparameter = </span></font><font face="Arial" color="#a020f0" size="2"><span style="font-size:10pt">'pow'</span></font><font face="Arial" size="2"><span style="font-size:10pt">;</span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt">cfg.colmin = 5; </span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt">cfg.colmax = 15; </span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt">cfg.clipsym = </span></font><font face="Arial" color="#a020f0" size="2"><span style="font-size:10pt">'yes'</span></font><font face="Arial" size="2"><span style="font-size:10pt">;</span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt"><br />
</span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt">However, this doesn’t seem to work since the clipping is performed on only
one end of the scale, eliminating the mirror reversed source at the other
end.</span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt"><br />
</span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt">Am I wrong in assuming cfg.clipsym would work here or am I using it in the
wrong way? </span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt"><br />
</span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt">(What I’m trying to do is exactly the same as realized in Figure 3 of
Medendorp et al. CerCor 2007). </span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt"><br />
</span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt">Any suggestions?</span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt"><br />
</span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt">Peter Praamstra</span></font></div>
<div align="left"><font face="Arial" size="2"><span style="font-size:10pt"><br />
</span></font></div>
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<p>The aim of this list is to facilitate the discussion between users of the FieldTrip toolbox, to share experiences and to discuss new ideas for MEG and EEG analysis.</p>
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<p> http://www.ru.nl/fcdonders/fieldtrip/</p>