<div dir="ltr">Hello;<div><br></div><div>Yes you were right. I have defined the wrong sensors i.e 'grad' instead of 'elec' while calculating the Leadfield.</div><div><br></div><div>Actually I am trying to calculate Combined source reconstruction from both EEG and MEG sensors.</div>
<div><br></div><div>Do you have any idea, how to define both elec and grad definition while calculating first forward then inverse solution.</div><div><br></div><div>Because in a fieldtrip either you can defined elec or grad at one time.</div>
<div><br></div><div><br></div><div><div style="font-family:arial,sans-serif;font-size:13px">Regards;</div><div style="font-family:arial,sans-serif;font-size:13px"><br></div><div style="font-family:arial,sans-serif;font-size:13px">
<br></div><div style="font-family:arial,sans-serif;font-size:13px">Mushfa Yousuf</div><div style="font-family:arial,sans-serif;font-size:13px"><br></div><div style="font-family:arial,sans-serif;font-size:13px">Neurozentrum,</div>
<div style="font-family:arial,sans-serif;font-size:13px">Universitätsklinikum Schleswig-Holstein, </div><div style="font-family:arial,sans-serif;font-size:13px">Campus Kiel (UKSH), Deutschland</div></div></div><div class="gmail_extra">
<br><br><div class="gmail_quote">On Tue, Apr 30, 2013 at 6:23 PM, Johanna Zumer <span dir="ltr"><<a href="mailto:johanna.zumer@gmail.com" target="_blank">johanna.zumer@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div dir="ltr">Hi Mushfa,<div><br></div><div>My guess is that the channels that have you used to compute .csdspctrm are not the same as the channels in cfg.elec. If you set cfg.channel = freqPost.label, does that solve it?</div>
<div><br></div><div>Cheers,</div><div>Johanna</div></div><div class="gmail_extra"><br><br><div class="gmail_quote">2013/4/30 Mushfa Yousuf <span dir="ltr"><<a href="mailto:mushfa.yousuf@googlemail.com" target="_blank">mushfa.yousuf@googlemail.com</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div class="h5"><div dir="ltr"><div>Hello Fieldtrippers,</div><div><br></div><div>I am doing source reconstruction using EEG channels on a fieldtrip.</div>
<div><br></div><div>I have computed Forward solution i.e head model using 'Openmeeg' and lead field successfully.</div>
<div><br></div><div>For the inverse solution using 'dics' method, I wrote the following syntax </div><div><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div> cfg = []; </div><div>
cfg.method = 'dics';</div><div> cfg.frequency = 130;</div><div> cfg.elec = dataFIC12.hdr.elec;</div><div> cfg.grid = grid; </div><div> cfg.vol = vol;</div><div><br></div><div> sourcePost = ft_sourceanalysis(cfg, freqPost);</div>
<div><br></div><div><br></div><div>and I have received the following error:</div><div><br></div><div><br></div><div><div><font color="#ff0000">??? Error using ==> mtimes</font></div><div><font color="#ff0000">Inner matrix dimensions must agree.</font></div>
<div><font color="#ff0000"><br></font></div><div><font color="#ff0000">Error in ==> beamformer_dics at 314</font></div><div><font color="#ff0000"> filt = pinv(lf' * invCf * lf) * lf' * invCf; %</font></div>
<div><font color="#ff0000"> Gross eqn. 3, use PINV/SVD to cover rank deficient</font></div><div><font color="#ff0000"> leadfield</font></div><div><font color="#ff0000"><br></font></div><div><font color="#ff0000">Error in ==> ft_sourceanalysis at 595</font></div>
<div><font color="#ff0000"> dip(i) = beamformer_dics(grid, sens, vol, [],</font></div><div><font color="#ff0000"> squeeze(Cf(i,:,:)), optarg{:});</font></div><div><font color="#ff0000"><br></font></div><div><font color="#ff0000">Error in ==> newCode at 214</font></div>
<div><font color="#ff0000">sourcePost = ft_sourceanalysis(cfg, freqPost);</font></div></div><div><br></div><div><br></div><div><br></div><div><br></div><div>Any help would be appreciated.</div><div><br></div><div><br></div>
<div>Regards;</div><div><br></div><div><br></div><div>Mushfa Yousuf</div><div><br></div><div>Neurozentrum,</div><div>Universitätsklinikum Schleswig-Holstein, </div><div>Campus Kiel (UKSH), Deutschland</div><div><br></div>
</div>
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