<font color="#000000"><font>Dear Lilla an<font>d Jörn,<br><br><font>thank you very m<font>uch f<font>or your reply on my <font>problem. </font></font></font></font></font></font></font><br><font>I alre<font>ady checked the example sites but g<font>ot still error messages<font>.<br>
<br>For creating the (l<font>eadfield</font>) grid variable used the temp<font>l</font>ate files provide<font>d by <font>Fieldtrip.<br><font>vol stru<font>cture: </font></font><br></font></font></font></font></font></font><font color="#000000"><font><font><font><font><font><font><font><font><font><font color="#000000"><font><font><font><font><font><font><font><font><font>load('c:\MATLAB\R2009b\work\fieldtrip-20130307\template\headmodel\standard_bem.mat');<br>
<br><font>I created a sensor<font> structure ba<font>sed on <font>the "standard_1020.elc" </font>file.<br><br><font>sens = <br><br> chanpos: [65x3 double]<br> elecpos: [65x3 double]<br> label: {65x1 cell}<br>
type: 'ext1020'<br> unit: 'mm'<br> pnt: [65x3 double]</font><br></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font><br>
<font>I started creating the leadfiled:</font><br>cfg = [];<br><font>c</font>fg.elec = sens;<br>cfg.vol = vol;<br>cfg.reducerank = 3;<br>cfg.grid.resolution = 1;<br>
[grid65] = ft_prepare_leadfield(cfg);<br><br><br>Finally I got the following error message. <br><font>??? Reference to non-existent field 'pnt'.<br><br>Error in ==> ft_prepare_vol_sens at 301<br>
sens.pnt = sens.pnt(selsens,:);<br><br>Error in ==> prepare_headmodel at 90<br>[vol, sens] = ft_prepare_vol_sens(vol, sens, 'channel', cfg.channel, 'order',<br>cfg.order);<br><br>Error in ==> ft_prepare_leadfield at 148<br>
[vol, sens, cfg] = prepare_headmodel(cfg, data);</font><br><br><br><font>That error message is funny because my sens variable has a sens.pnt su<font>bno<font>de.</font></font></font><br><br>I (hopefully) solved the problem by editing the <font> "</font><font color="#000000"><font><font><font><font><font><font><font><font color="#000000"><font><font><font><font><font><font><font><font><font> ft_prepare_vol_sens"</font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font></font> function and loading the s<font>ens variable just before the error line in the 295</font>. It is running now but is <font>t<font>hat way correct?</font></font><br>
<br>Any help is highly appreciated.<br>Thank you very much.<br>Best,<br>Enrico<br><br><br><div class="gmail_quote">On 5 March 2013 12:08, <span dir="ltr"><<a href="mailto:Lilla.Magyari@mpi.nl" target="_blank">Lilla.Magyari@mpi.nl</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Dear Enrico,<br>
<br>
I think more information is needed about the error messages and about how<br>
you try to compute leadfield in order to help.<br>
<br>
If you have not encountered the FT tutorial sites, example scripts and<br>
FAQs yet, maybe you can check out those as well because they provide<br>
information on source-reconstruction, leadfields... etc..<br>
(For example, a tutorial for EEG headmodels:<br>
<a href="http://fieldtrip.fcdonders.nl/tutorial/headmodel_eeg" target="_blank">http://fieldtrip.fcdonders.nl/tutorial/headmodel_eeg</a> and an example script<br>
for leadfield computation:<br>
<a href="http://fieldtrip.fcdonders.nl/example/compute_leadfield" target="_blank">http://fieldtrip.fcdonders.nl/example/compute_leadfield</a>).<br>
<br>
Best,<br>
Lilla<br>
<div class="HOEnZb"><div class="h5"><br>
<br>
> Dear Fieldtrip experts,<br>
><br>
> I would like to create a leadfield based on the standard brain provided by<br>
> the fieldtrip package and standard electrode positions.<br>
> Unfortunately, whatever I'm trying it ends up in a number of error<br>
> messages.<br>
><br>
> Is anybody out there who could provide some support?<br>
><br>
> Thank you very much in advance,<br>
> Best,<br>
> Enrico<br>
><br>
><br>
> --<br>
> Dr. Enrico Schulz<br>
> Postdoc<br>
> Klinikum rechts der Isar der Technischen Universität München<br>
> Neurologische Klinik und Poliklinik<br>
> Neuro-Kopf-Zentrum<br>
> Ismaningerstr. 22<br>
> 81675 München<br>
><br>
> Tel.: 089-4140-7664<br>
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</div></div></blockquote></div><br><br clear="all"><br>-- <br>
<div>Dr. Enrico Schulz<br></div><div>Postdoc</div> Klinikum rechts der Isar der Technischen Universität München<br> Neurologische Klinik und Poliklinik<br> Neuro-Kopf-Zentrum<br> Ismaningerstr. 22<br> 81675 München<br><br>
Tel.: 089-4140-7664
<br>