<div dir="ltr">Hi Tzvetan,<div><br></div><div>Thank you for your quick reply! You are right - I see I had the cfg.grid.unit accidentally set to 'mm' instead of 'cm'. Changing this left me with 1,484 dipoles and an excellent computation time.</div><div><br></div><div>Thanks again,</div><div>Helen</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Jul 23, 2015 at 12:36 PM, Tzvetan Popov <span dir="ltr"><<a href="mailto:tzvetan.popov@uni-konstanz.de" target="_blank">tzvetan.popov@uni-konstanz.de</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi Helen,<br>
this isn’t normal and is likely due to mismatch in units. I suspect the error somewhere in cfg.grid.resolution = XX;<br>
during the call to ft_prepare_leadfield.<br>
best<br>
tzvetan<br>
<div><div class="h5"><br>
<br>
> Dear Fieldtrip Users,<br>
><br>
> I'm in the midst of computing Beamformer source analysis with my EEG data, (I am a new user of FieldTrip), and am experiencing extraordinarily long computation times.<br>
><br>
> Using my own data, with the FieldTrip template vol.mat headmodel, FieldTrip computes a leadfield with 1,472,505 dipoles inside the brain. This alone takes my computer 3 hours to compute, whereafter source analysis still has to take place ... taking another 3 hours.<br>
><br>
> This number of dipoles seems (to me) abnormally high - but apart from taking so long, the code runs fine without any errors.<br>
><br>
> Is anyone able to weigh in on whether or not I've gone wrong somewhere? Happy to include code as needed.<br>
><br>
> Thanks very much!<br>
><br>
> Helen Wieffering<br>
> Bowdoin College<br>
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