<div dir="ltr"><div class="gmail_default" style="font-family:tahoma,sans-serif;color:rgb(51,51,51)">Hi Jan-Mathijs,</div><div class="gmail_default" style="font-family:tahoma,sans-serif;color:rgb(51,51,51)"><br></div><div class="gmail_default" style="font-family:tahoma,sans-serif;color:rgb(51,51,51)">Thanks for your quick response, H2H. I've actually learned about precooked models with your answer. Many thanks.</div><div class="gmail_default" style="font-family:tahoma,sans-serif;color:rgb(51,51,51)"><br></div><div class="gmail_default"><font color="#333333" face="tahoma, sans-serif">In the same page, in the part "</font>Make the individual subjects' grid", there seems to be a unit-related problem. One can find this code<br></div><div class="gmail_default"><br></div><div class="gmail_default"><pre class="" style="padding:0.5em;margin-top:0px;margin-bottom:1em;font-size:12px;border:1px dashed rgb(204,204,204);color:rgb(0,0,0);overflow:hidden;font-family:Consolas,'Andale Mono',Menlo,Monaco,monospace;white-space:pre-wrap;width:640px;text-align:justify;background-color:rgb(247,249,250)"><span class="" style="padding:0px;margin:0px;color:rgb(128,128,128);font-style:italic">% read the single subject anatomical MRI</span>
mri = ft_read_mri<span class="" style="padding:0px;margin:0px;color:rgb(102,204,102)">(</span><span class="" style="padding:0px;margin:0px;color:rgb(128,128,128);font-style:italic">'Subject01.mri'</span><span class="" style="padding:0px;margin:0px;color:rgb(102,204,102)">)</span>;
<span class="" style="padding:0px;margin:0px;color:rgb(128,128,128);font-style:italic">% segment the anatomical MRI</span>
cfg = <span class="" style="padding:0px;margin:0px;color:rgb(102,204,102)">[</span><span class="" style="padding:0px;margin:0px;color:rgb(102,204,102)">]</span>;
cfg.<span class="" style="padding:0px;margin:0px;color:rgb(0,102,0)">output</span> = <span class="" style="padding:0px;margin:0px;color:rgb(128,128,128);font-style:italic">'brain'</span>;
seg = ft_volumesegment<span class="" style="padding:0px;margin:0px;color:rgb(102,204,102)">(</span>cfg, mri<span class="" style="padding:0px;margin:0px;color:rgb(102,204,102)">)</span>;
<span class="" style="padding:0px;margin:0px;color:rgb(128,128,128);font-style:italic">% construct the volume conductor model (i.e. head model) for each subject</span>
<span class="" style="padding:0px;margin:0px;color:rgb(128,128,128);font-style:italic">% this is optional, and for the purpose of this tutorial only required for</span>
<span class="" style="padding:0px;margin:0px;color:rgb(128,128,128);font-style:italic">% plotting, later on</span>
cfg = <span class="" style="padding:0px;margin:0px;color:rgb(102,204,102)">[</span><span class="" style="padding:0px;margin:0px;color:rgb(102,204,102)">]</span>;
cfg.<span class="" style="padding:0px;margin:0px;color:rgb(0,102,0)">method</span> = <span class="" style="padding:0px;margin:0px;color:rgb(128,128,128);font-style:italic">'singleshell'</span>;
headmodel = ft_prepare_headmodel<span class="" style="padding:0px;margin:0px;color:rgb(102,204,102)">(</span>cfg, seg<span class="" style="padding:0px;margin:0px;color:rgb(102,204,102)">)</span>;
<span class="" style="padding:0px;margin:0px;color:rgb(128,128,128);font-style:italic">% create the subject specific grid, using the template grid that has just been created</span>
cfg = <span class="" style="padding:0px;margin:0px;color:rgb(102,204,102)">[</span><span class="" style="padding:0px;margin:0px;color:rgb(102,204,102)">]</span>;
cfg.<a href="http://www.mathworks.com/access/helpdesk/help/techdoc/ref/grid.html" title="" style="padding:0px;margin:0px;color:rgb(0,136,204);text-decoration:none"><span class="" style="padding:0px;margin:0px;color:rgb(0,0,0);font-weight:bold">grid</span></a>.<span class="" style="padding:0px;margin:0px;color:rgb(0,102,0)">warpmni</span> = <span class="" style="padding:0px;margin:0px;color:rgb(128,128,128);font-style:italic">'yes'</span>;
cfg.<a href="http://www.mathworks.com/access/helpdesk/help/techdoc/ref/grid.html" title="" style="padding:0px;margin:0px;color:rgb(0,136,204);text-decoration:none"><span class="" style="padding:0px;margin:0px;color:rgb(0,0,0);font-weight:bold">grid</span></a>.<span class="" style="padding:0px;margin:0px;color:rgb(0,102,0)">template</span> = template_grid;
cfg.<a href="http://www.mathworks.com/access/helpdesk/help/techdoc/ref/grid.html" title="" style="padding:0px;margin:0px;color:rgb(0,136,204);text-decoration:none"><span class="" style="padding:0px;margin:0px;color:rgb(0,0,0);font-weight:bold">grid</span></a>.<span class="" style="padding:0px;margin:0px;color:rgb(0,102,0)">nonlinear</span> = <span class="" style="padding:0px;margin:0px;color:rgb(128,128,128);font-style:italic">'yes'</span>; <span class="" style="padding:0px;margin:0px;color:rgb(128,128,128);font-style:italic">% use non-linear normalization</span>
cfg.<span class="" style="padding:0px;margin:0px;color:rgb(0,102,0)">mri</span> = mri;
<a href="http://www.mathworks.com/access/helpdesk/help/techdoc/ref/grid.html" title="" style="padding:0px;margin:0px;color:rgb(0,136,204);text-decoration:none"><span class="" style="padding:0px;margin:0px;color:rgb(0,0,0);font-weight:bold">grid</span></a> = ft_prepare_sourcemodel<span class="" style="padding:0px;margin:0px;color:rgb(102,204,102)">(</span>cfg<span class="" style="padding:0px;margin:0px;color:rgb(102,204,102)">)</span>;
<span class="" style="padding:0px;margin:0px;color:rgb(128,128,128);font-style:italic">% make a figure of the single subject headmodel, and grid positions</span>
<a href="http://www.mathworks.com/access/helpdesk/help/techdoc/ref/figure.html" title="" style="padding:0px;margin:0px;color:rgb(0,136,204);text-decoration:none"><span class="" style="padding:0px;margin:0px;color:rgb(0,0,0);font-weight:bold">figure</span></a>; <a href="http://www.mathworks.com/access/helpdesk/help/techdoc/ref/hold.html" title="" style="padding:0px;margin:0px;color:rgb(0,136,204);text-decoration:none"><span class="" style="padding:0px;margin:0px;color:rgb(0,0,0);font-weight:bold">hold</span></a> on;
ft_plot_vol<span class="" style="padding:0px;margin:0px;color:rgb(102,204,102)">(</span>headmodel, <span class="" style="padding:0px;margin:0px;color:rgb(128,128,128);font-style:italic">'edgecolor'</span>, <span class="" style="padding:0px;margin:0px;color:rgb(128,128,128);font-style:italic">'none'</span>, <span class="" style="padding:0px;margin:0px;color:rgb(128,128,128);font-style:italic">'facealpha'</span>, <span class="" style="padding:0px;margin:0px;color:rgb(204,102,204)">0.4</span><span class="" style="padding:0px;margin:0px;color:rgb(102,204,102)">)</span>;
ft_plot_mesh<span class="" style="padding:0px;margin:0px;color:rgb(102,204,102)">(</span><a href="http://www.mathworks.com/access/helpdesk/help/techdoc/ref/grid.html" title="" style="padding:0px;margin:0px;color:rgb(0,136,204);text-decoration:none"><span class="" style="padding:0px;margin:0px;color:rgb(0,0,0);font-weight:bold">grid</span></a>.<span class="" style="padding:0px;margin:0px;color:rgb(0,102,0)">pos</span><span class="" style="padding:0px;margin:0px;color:rgb(102,204,102)">(</span><a href="http://www.mathworks.com/access/helpdesk/help/techdoc/ref/grid.html" title="" style="padding:0px;margin:0px;color:rgb(0,136,204);text-decoration:none"><span class="" style="padding:0px;margin:0px;color:rgb(0,0,0);font-weight:bold">grid</span></a>.<span class="" style="padding:0px;margin:0px;color:rgb(0,102,0)">inside</span>,:<span class="" style="padding:0px;margin:0px;color:rgb(102,204,102)">)</span><span class="" style="padding:0px;margin:0px;color:rgb(102,204,102)">)</span>;</pre><div class="gmail_default" style="color:rgb(51,51,51);font-family:tahoma,sans-serif">When executing it, there seems to be a problem with dimensions. "headmodel" struct is in mm and "grid" struct is in cm. So unfortunately the resulting figure ends up being something like </div><div class="gmail_default" style="color:rgb(51,51,51);font-family:tahoma,sans-serif"><img src="cid:ii_151910eabb4e7ff6" alt="Inline image 1" width="495" height="359"><br></div><div class="gmail_default" style="color:rgb(51,51,51);font-family:tahoma,sans-serif"><br></div><div class="gmail_default"><font color="#333333" face="tahoma, sans-serif">I've tested to specify 'mm' units in the configuration struct before calling ft_prepare_sourcemodel: </font>cfg.grid.unit='mm';</div><div class="gmail_default"><br></div><div class="gmail_default">Or by calling ft_convert_units right after ft_prepare_sourcemodel. </div><div class="gmail_default"><br></div><div class="gmail_default">grid=ft_convert_units(grid,'mm');</div><div class="gmail_default" style="color:rgb(51,51,51);font-family:tahoma,sans-serif"><br></div><div class="gmail_default" style="color:rgb(51,51,51);font-family:tahoma,sans-serif">Both solutions work fine, producing a figure very similar to the one in the tutorial. I've included the first solution in the wiki.</div><div class="gmail_default" style="color:rgb(51,51,51);font-family:tahoma,sans-serif"><br></div><div class="gmail_default" style="color:rgb(51,51,51);font-family:tahoma,sans-serif">I hope this is ok.</div><div class="gmail_default" style="color:rgb(51,51,51);font-family:tahoma,sans-serif"><br></div><div class="gmail_default" style="color:rgb(51,51,51);font-family:tahoma,sans-serif">Best,</div><div class="gmail_default" style="color:rgb(51,51,51);font-family:tahoma,sans-serif"><br></div></div></div><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature"><div dir="ltr"><div><div><br></div><div><font color="#999999">Juan</font></div></div></div></div></div>
<br><div class="gmail_quote">On Fri, Dec 11, 2015 at 1:19 PM, Schoffelen, J.M. (Jan Mathijs) <span dir="ltr"><<a href="mailto:jan.schoffelen@donders.ru.nl" target="_blank">jan.schoffelen@donders.ru.nl</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div style="word-wrap:break-word">
Hi Juan,
<div><br>
</div>
<div>I could reproduce your issue, and have done 2 things:</div>
<div>- I updated the wiki to make it clear that it would be easier to use a pre-cooked grid.</div>
<div>- I adjusted ft_prepare_sourcemodel so that it also works when only providing the template_headmodel, as per the example code. </div>
<div>The new version of ft_prepare_sourcemodel will become available in tonight’s release on the ftp-server.</div>
<div><br>
</div>
<div>Best wishes, and thanks for noticing.</div>
<div>Jan-Mathijs </div>
<div><br>
</div>
<div><br>
<div><div><div class="h5">
<div>On Dec 11, 2015, at 11:43 AM, Juan <<a href="mailto:juangpc@gmail.com" target="_blank">juangpc@gmail.com</a>> wrote:</div>
<br>
</div></div><blockquote type="cite"><div><div class="h5">
<div dir="ltr">
<div class="gmail_default" style="font-family:tahoma,sans-serif;color:#333333">Dear Community, <br>
</div>
<div class="gmail_quote">
<div dir="ltr">
<div style="font-family:tahoma,sans-serif;color:rgb(51,51,51)"><br>
</div>
<div style="font-family:tahoma,sans-serif;color:rgb(51,51,51)">My name is Juan Garcia-Prieto and I am working in Madrid's MEG Lab. Currently I am learning to do beamforming source analysis using Fieldtrip. </div>
<div style="font-family:tahoma,sans-serif;color:rgb(51,51,51)"><br>
</div>
While following the tutorial: "<a href="http://goog_2124598831/" target="_blank"><span></span>Creating a sourcemodel for source-reconstruction of MEG or EEG data</a>
<div style="font-family:tahoma,sans-serif;color:rgb(51,51,51);display:inline"><a href="http:/" target="_blank"><span></span></a>"</div>
<div style="font-family:tahoma,sans-serif;color:rgb(51,51,51);display:inline"></div>
<span style="color:rgb(51,51,51);font-family:tahoma,sans-serif">
<div style="font-family:tahoma,sans-serif;color:rgb(51,51,51);display:inline"> when I reach "</div>
</span>Subject-specific grids that are equivalent across subjects in normalized space
<div style="font-family:tahoma,sans-serif;color:rgb(51,51,51);display:inline">" procedure , there is an example code. This code throws an error when I execute it with a version of Fieldtrip I downloaded yesterday. I think I have downloaded correctly all the
required info (Subject01.zip).</div>
<div><font color="#333333" face="tahoma, sans-serif"><br>
</font></div>
<div><font color="#333333" face="tahoma, sans-serif">Code: </font></div>
<div><font color="#333333" face="tahoma, sans-serif"><br>
</font></div>
<div>
<pre style="padding:0.5em;margin-top:0px;margin-bottom:1em;font-size:12px;border:1px dashed rgb(204,204,204);overflow:hidden;font-family:Consolas,'Andale Mono',Menlo,Monaco,monospace;white-space:pre-wrap;width:640px;text-align:justify;background-color:rgb(247,249,250)"><span style="padding:0px;margin:0px;color:rgb(128,128,128);font-style:italic">% NOTE: the path to the template file is user-specific</span>
template = ft_read_mri<span style="padding:0px;margin:0px;color:rgb(102,204,102)">(</span><span style="padding:0px;margin:0px;color:rgb(128,128,128);font-style:italic">'~/matlab/fieldtrip/external/spm8/templates/T1.nii'</span><span style="padding:0px;margin:0px;color:rgb(102,204,102)">)</span>;
template.<span style="padding:0px;margin:0px;color:rgb(0,102,0)">coordsys</span> = <span style="padding:0px;margin:0px;color:rgb(128,128,128);font-style:italic">'spm'</span>; <span style="padding:0px;margin:0px;color:rgb(128,128,128);font-style:italic">% so that FieldTrip knows how to interpret the coordinate system</span>
<span style="padding:0px;margin:0px;color:rgb(128,128,128);font-style:italic">% segment the template brain and construct a volume conduction model (i.e. head model): </span>
<span style="padding:0px;margin:0px;color:rgb(128,128,128);font-style:italic">% this is needed to describe the boundary that define which dipole locations are 'inside' the brain.</span>
cfg = <span style="padding:0px;margin:0px;color:rgb(102,204,102)">[</span><span style="padding:0px;margin:0px;color:rgb(102,204,102)">]</span>;
template_seg = ft_volumesegment<span style="padding:0px;margin:0px;color:rgb(102,204,102)">(</span>cfg, template<span style="padding:0px;margin:0px;color:rgb(102,204,102)">)</span>;
cfg = <span style="padding:0px;margin:0px;color:rgb(102,204,102)">[</span><span style="padding:0px;margin:0px;color:rgb(102,204,102)">]</span>;
cfg.<span style="padding:0px;margin:0px;color:rgb(0,102,0)">method</span> = <span style="padding:0px;margin:0px;color:rgb(128,128,128);font-style:italic">'singleshell'</span>;
template_headmodel = ft_prepare_headmodel<span style="padding:0px;margin:0px;color:rgb(102,204,102)">(</span>cfg, template_seg<span style="padding:0px;margin:0px;color:rgb(102,204,102)">)</span>;
template_headmodel = ft_convert_units<span style="padding:0px;margin:0px;color:rgb(102,204,102)">(</span>template_headmodel, <span style="padding:0px;margin:0px;color:rgb(128,128,128);font-style:italic">'cm'</span><span style="padding:0px;margin:0px;color:rgb(102,204,102)">)</span>; <span style="padding:0px;margin:0px;color:rgb(128,128,128);font-style:italic">% Convert the vol to cm, because the CTF convenction is to express everything in cm.</span>
<span style="padding:0px;margin:0px;color:rgb(128,128,128);font-style:italic">% construct the dipole grid in the template brain coordinates</span>
<span style="padding:0px;margin:0px;color:rgb(128,128,128);font-style:italic">% the negative inwardshift means an outward shift of the brain surface for inside/outside detection</span>
cfg = <span style="padding:0px;margin:0px;color:rgb(102,204,102)">[</span><span style="padding:0px;margin:0px;color:rgb(102,204,102)">]</span>;
cfg.<a href="http://www.mathworks.com/access/helpdesk/help/techdoc/ref/grid.html" title="" style="padding:0px;margin:0px;color:rgb(0,136,204);text-decoration:none" target="_blank"><span style="padding:0px;margin:0px;font-weight:bold">grid</span></a>.<span style="padding:0px;margin:0px;color:rgb(0,102,0)">resolution</span> = <span style="padding:0px;margin:0px;color:rgb(204,102,204)">1</span>;
cfg.<a href="http://www.mathworks.com/access/helpdesk/help/techdoc/ref/grid.html" title="" style="padding:0px;margin:0px;color:rgb(0,136,204);text-decoration:none" target="_blank"><span style="padding:0px;margin:0px;font-weight:bold">grid</span></a>.<span style="padding:0px;margin:0px;color:rgb(0,102,0)">tight</span> = <span style="padding:0px;margin:0px;color:rgb(128,128,128);font-style:italic">'yes'</span>;
cfg.<span style="padding:0px;margin:0px;color:rgb(0,102,0)">inwardshift</span> = -<span style="padding:0px;margin:0px;color:rgb(204,102,204)">1.5</span>;
<div style="font-family:tahoma,sans-serif;color:rgb(51,51,51);display:inline"></div>cfg.<span style="padding:0px;margin:0px;color:rgb(0,102,0)">headmodel</span> = template_headmodel;
<br></pre>
</div>
<div>
<div style="font-family:tahoma,sans-serif;color:rgb(51,51,51)">The problem occurs when I execute this line:</div>
</div>
<div><font color="#333333" face="tahoma, sans-serif"><br>
</font></div>
<div>
<pre style="padding:0.5em;margin-top:0px;margin-bottom:1em;font-size:12px;border:1px dashed rgb(204,204,204);overflow:hidden;font-family:Consolas,'Andale Mono',Menlo,Monaco,monospace;white-space:pre-wrap;width:640px;text-align:justify;background-color:rgb(247,249,250)"><div style="font-family:tahoma,sans-serif;color:rgb(51,51,51);display:inline"></div><div style="font-family:tahoma,sans-serif;color:rgb(51,51,51);display:inline"></div><div style="font-family:tahoma,sans-serif;color:rgb(51,51,51);display:inline"></div><div style="font-family:tahoma,sans-serif;color:rgb(51,51,51);display:inline"></div>template_grid = ft_prepare_sourcemodel<span style="padding:0px;margin:0px;color:rgb(102,204,102)">(</span>cfg<span style="padding:0px;margin:0px;color:rgb(102,204,102)">)</span>;</pre>
</div>
<div><font color="#333333" face="tahoma, sans-serif">Matlab's output: </font></div>
<div>
<div style="color:rgb(51,51,51);font-family:tahoma,sans-serif;display:inline"></div>
<span style="color:rgb(51,51,51);font-family:tahoma,sans-serif">>> template_grid = ft_prepare_sourcemodel(cfg);</span><br>
</div>
<div><font color="#333333" face="tahoma, sans-serif">creating dipole grid based on automatic 3D grid with specified resolution</font></div>
<div><font face="tahoma, sans-serif" color="#ff0000">Error using ft_prepare_sourcemodel (line 317)</font></div>
<div><font face="tahoma, sans-serif"><font color="#ff0000">creating a 3D-grid sourcemodel this way requires sensor position information to estimate the extent of the brain
<div style="font-family:tahoma,sans-serif;display:inline"></div>
</font><br>
</font>
<div>
<div style="font-family:tahoma,sans-serif;color:rgb(51,51,51);display:inline"><br>
</div>
</div>
<div>
<div style="font-family:tahoma,sans-serif;color:rgb(51,51,51);display:inline">I have managed to look around and found that you can specify the required "sensor position information" by executing this code just before (considering the folder with the information
downloaded for this subject is located just there:</div>
</div>
<div><br>
</div>
<div>
<div style="font-family:tahoma,sans-serif;color:rgb(51,51,51);display:inline">
<pre style="padding:0.5em;margin-top:0px;margin-bottom:1em;font-size:12px;border:1px dashed rgb(204,204,204);overflow:hidden;font-family:Consolas,'Andale Mono',Menlo,Monaco,monospace;white-space:pre-wrap;width:640px;text-align:justify;background-color:rgb(247,249,250)"><div style="font-family:tahoma,sans-serif;color:rgb(51,51,51);display:inline">cfg.gradfile='Subject01\Subject01.ds\Subject01.res4';</div>
</pre>
<div>Then the rest of the sample code in the tutorial can be executed with no issues. <br>
</div>
<div><br>
</div>
<div>
<pre style="padding:0.5em;margin-top:0px;margin-bottom:1em;font-size:12px;border:1px dashed rgb(204,204,204);overflow:hidden;font-family:Consolas,'Andale Mono',Menlo,Monaco,monospace;white-space:pre-wrap;width:640px;text-align:justify;background-color:rgb(247,249,250)">template_grid = ft_prepare_sourcemodel<span style="padding:0px;margin:0px;color:rgb(102,204,102)">(</span>cfg<span style="padding:0px;margin:0px;color:rgb(102,204,102)">)</span>;
<span style="padding:0px;margin:0px;color:rgb(128,128,128);font-style:italic">% make a figure with the template head model and dipole grid</span>
<a href="http://www.mathworks.com/access/helpdesk/help/techdoc/ref/figure.html" title="" style="padding:0px;margin:0px;color:rgb(0,136,204);text-decoration:none" target="_blank"><span style="padding:0px;margin:0px;font-weight:bold">figure</span></a>
<a href="http://www.mathworks.com/access/helpdesk/help/techdoc/ref/hold.html" title="" style="padding:0px;margin:0px;color:rgb(0,136,204);text-decoration:none" target="_blank"><span style="padding:0px;margin:0px;font-weight:bold">hold</span></a> on
ft_plot_vol<span style="padding:0px;margin:0px;color:rgb(102,204,102)">(</span>template_vol, <span style="padding:0px;margin:0px;color:rgb(128,128,128);font-style:italic">'facecolor'</span>, <span style="padding:0px;margin:0px;color:rgb(128,128,128);font-style:italic">'cortex'</span>, <span style="padding:0px;margin:0px;color:rgb(128,128,128);font-style:italic">'edgecolor'</span>, <span style="padding:0px;margin:0px;color:rgb(128,128,128);font-style:italic">'none'</span><span style="padding:0px;margin:0px;color:rgb(102,204,102)">)</span>;alpha <span style="padding:0px;margin:0px;color:rgb(204,102,204)">0.5</span>; <a href="http://www.mathworks.com/access/helpdesk/help/techdoc/ref/camlight.html" title="" style="padding:0px;margin:0px;color:rgb(0,136,204);text-decoration:none" target="_blank"><span style="padding:0px;margin:0px;font-weight:bold">camlight</span></a>;
ft_plot_mesh<span style="padding:0px;margin:0px;color:rgb(102,204,102)">(</span>template_grid.<span style="padding:0px;margin:0px;color:rgb(0,102,0)">pos</span><span style="padding:0px;margin:0px;color:rgb(102,204,102)">(</span>template_grid.<span style="padding:0px;margin:0px;color:rgb(0,102,0)">inside</span>,:<span style="padding:0px;margin:0px;color:rgb(102,204,102)">)</span><span style="padding:0px;margin:0px;color:rgb(102,204,102)">)</span>;</pre>
</div>
</div>
</div>
<div>
<div style="font-family:tahoma,sans-serif;color:rgb(51,51,51);display:inline"><br>
</div>
</div>
<div>
<div style="font-family:tahoma,sans-serif;color:rgb(51,51,51);display:inline">My questions: </div>
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<div style="font-family:tahoma,sans-serif;color:rgb(51,51,51)">Is there a better solution for this problem? Maybe I can learn a little bit more about the toolbox with your answers. </div>
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<div style="font-family:tahoma,sans-serif;color:rgb(51,51,51)">I didn't want to correct the wiki because my solution depends on where one is placing the downloaded subject's data, and it is platform dependent. Should I add something to the tutorial anyway?
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I figure this can be interesting to other people.</div>
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<div style="font-family:tahoma,sans-serif;color:rgb(51,51,51)">Best,</div>
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<div><span style="color:rgb(153,153,153)"><br>
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<div><span style="color:rgb(153,153,153)">Juan</span></div>
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