<div dir="ltr">Hi Yaroslav -<div><br></div><div>Thanks for taking the time to respond. A point of clarification, if you don't mind:<div><br></div><div class="gmail_extra"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex">
Original tutorial data is still out there from the original location and<br>
it is the one which actually should be used to go through the tutorial<br>
-- nothing really changed in this regard.<br></blockquote><div><br></div><div>I'm looking through the directory where macports installed PyMVPA. In that subtree, there's only one occurrence of the mask_vt.nii.gz file mentioned in the tutorial (for instance, here: <a href="http://www.pymvpa.org/tutorial_mappers.html">http://www.pymvpa.org/tutorial_mappers.html</a>) which is in the new tutorial_data_25mm/data/ subdir. The confusing thing is that this mask has only a single non-zero voxel; which means that when you go through this section of the tutorial (on the same page as linked above):</div>
<div><br></div><div><div class="" style="color:rgb(0,0,0);font-family:Arial,sans-serif"><div class="" style="background-image:initial;background-color:rgb(238,255,204);background-repeat:initial"><pre style="padding:10px;color:rgb(51,51,51);line-height:15.600000381469727px;border-top-width:1px;border-bottom-width:1px;border-style:solid none;border-top-color:rgb(170,204,153);border-bottom-color:rgb(170,204,153)">
<span class="" style="color:rgb(198,93,9);font-weight:bold">>>> </span><span class="">fds</span> <span class="" style="color:rgb(102,102,102)">=</span> <span class="">fmri_dataset</span><span class="">(</span><span class="">samples</span><span class="" style="color:rgb(102,102,102)">=</span><span class="">os</span><span class="" style="color:rgb(102,102,102)">.</span><span class="">path</span><span class="" style="color:rgb(102,102,102)">.</span><span class="">join</span><span class="">(</span><span class="">datapath</span><span class="">,</span> <span class="" style="color:rgb(64,112,160)">'bold.nii.gz'</span><span class="">),</span>
<span class="" style="color:rgb(198,93,9);font-weight:bold">... </span> <span class="">targets</span><span class="" style="color:rgb(102,102,102)">=</span><span class="">attr</span><span class="" style="color:rgb(102,102,102)">.</span><span class="">targets</span><span class="">,</span> <span class="">chunks</span><span class="" style="color:rgb(102,102,102)">=</span><span class="">attr</span><span class="" style="color:rgb(102,102,102)">.</span><span class="">chunks</span><span class="">,</span>
<span class="" style="color:rgb(198,93,9);font-weight:bold">... </span> <span class="">mask</span><span class="" style="color:rgb(102,102,102)">=</span><span class="">os</span><span class="" style="color:rgb(102,102,102)">.</span><span class="">path</span><span class="" style="color:rgb(102,102,102)">.</span><span class="">join</span><span class="">(</span><span class="">datapath</span><span class="">,</span> <span class="" style="color:rgb(64,112,160)">'mask_vt.nii.gz'</span><span class="">))</span>
<span class="" style="color:rgb(198,93,9);font-weight:bold">>>> </span><span class="">fds</span><span class="" style="color:rgb(102,102,102)">.</span><span class="">shape</span>
<span class="" style="color:rgb(51,51,51)">(1452, 577)</span>
<span class="" style="color:rgb(198,93,9);font-weight:bold">>>> </span><span class="" style="color:rgb(0,112,32);font-weight:bold">print</span> <span class="">fds</span><span class="" style="color:rgb(102,102,102)">.</span><span class="">sa</span>
<span class="" style="color:rgb(51,51,51)"><SampleAttributesCollection: chunks,targets,time_coords,time_indices></span></pre></div></div></div><div>the fds.shape actually reports (1452, 1).</div><div><br></div><div>
If I'm interpreting your reply correctly, the old tutorial data, with a mask_vt.nii.gz that includes 577 features, is supposed to still be distributed with PyMVPA 2.31, correct? Let me check the git repo ... okay, a fresh checkout of the git repo is the same -- the only copy of mask_vt.nii.gz is in tutorial_data_25mm/data/ and consists of a single giant non-zero voxel.</div>
<div><br></div><div>So it seems as if something has gone wrong, and the data that's supposed to be used with the tutorial is no longer shipped with 2.31. Or else I'm doing something wrong in the installation process. Could you advise?</div>
<div><br></div><div>Thanks for your help,</div><div><br></div><div>S</div></div></div></div></div>