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Dear user group,
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<div class="">I am trying to smooth particle data output from GIZMO onto an arbitrary grid, then save the object as data set and reload in order to do volume rendering. However I can not handle the reloaded data set.</div>
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<div class="">To clarify, I smooth yt sample data — FIRE_M12i_ref11 onto a 64**3 grid, the code is like this:</div>
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<span style="font-variant-ligatures: no-common-ligatures; color: #cd7923" class=""> 1
</span><span style="font-variant-ligatures: no-common-ligatures" class="">import</span><span style="font-variant-ligatures: no-common-ligatures; color: #000000" class=""> yt</span></div>
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<span style="font-variant-ligatures: no-common-ligatures; color: #cd7923" class=""> 2 </span></div>
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<span style="font-variant-ligatures: no-common-ligatures; color: #cd7923" class=""> 3
</span><span style="font-variant-ligatures: no-common-ligatures; color: #000000" class="">ytname=</span><span style="font-variant-ligatures: no-common-ligatures" class="">'FIRE_M12i_ref11/snapshot_600.hdf5'</span></div>
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<span style="font-variant-ligatures: no-common-ligatures; color: #cd7923" class=""> 4
</span><span style="font-variant-ligatures: no-common-ligatures" class="">ds=yt.load(ytname)</span></div>
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<span style="font-variant-ligatures: no-common-ligatures" class=""> 5 </span></div>
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<span style="font-variant-ligatures: no-common-ligatures; color: #cd7923" class=""> 6
</span><span style="font-variant-ligatures: no-common-ligatures" class=""># define the region</span></div>
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<span style="font-variant-ligatures: no-common-ligatures; color: #cd7923" class=""> 7
</span><span style="font-variant-ligatures: no-common-ligatures" class="">left = ds.domain_left_edge</span></div>
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</span><span style="font-variant-ligatures: no-common-ligatures" class="">right = ds.domain_right_edge</span></div>
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<span style="font-variant-ligatures: no-common-ligatures" class=""> 9 </span></div>
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<span style="font-variant-ligatures: no-common-ligatures; color: #cd7923" class=""> 10
</span><span style="font-variant-ligatures: no-common-ligatures" class="">#now create an abitrary grid and save</span></div>
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<span style="font-variant-ligatures: no-common-ligatures; color: #cd7923" class=""> 11
</span><span style="font-variant-ligatures: no-common-ligatures" class="">arb = ds.arbitrary_grid(left, right,dims=[</span><span style="font-variant-ligatures: no-common-ligatures; color: #c33720" class="">64</span><span style="font-variant-ligatures: no-common-ligatures" class="">,
</span><span style="font-variant-ligatures: no-common-ligatures; color: #c33720" class="">64</span><span style="font-variant-ligatures: no-common-ligatures" class="">,
</span><span style="font-variant-ligatures: no-common-ligatures; color: #c33720" class="">64</span><span style="font-variant-ligatures: no-common-ligatures" class="">])</span></div>
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<span style="font-variant-ligatures: no-common-ligatures" class=""> 12 </span></div>
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<span style="font-variant-ligatures: no-common-ligatures; color: #cd7923" class=""> 13
</span><span style="font-variant-ligatures: no-common-ligatures" class="">fn = arb.save_as_dataset(fields=[(</span><span style="font-variant-ligatures: no-common-ligatures; color: #c33720" class="">'PartType0'</span><span style="font-variant-ligatures: no-common-ligatures" class="">,</span><span style="font-variant-ligatures: no-common-ligatures; color: #c33720" class="">'density'</span><span style="font-variant-ligatures: no-common-ligatures" class="">)])</span></div>
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<span style="font-variant-ligatures: no-common-ligatures" class=""> 14 </span></div>
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<span style="font-variant-ligatures: no-common-ligatures; color: #cd7923" class=""> 15
</span><span style="font-variant-ligatures: no-common-ligatures; color: #000000" class="">arb_ds = yt.load(</span><span style="font-variant-ligatures: no-common-ligatures" class="">'snapshot_600_arbitrary_grid.h5'</span><span style="font-variant-ligatures: no-common-ligatures; color: #000000" class="">)</span></div>
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<span style="font-variant-ligatures: no-common-ligatures; color: #cd7923" class=""> 16
</span><span style="font-variant-ligatures: no-common-ligatures; color: #33bbc8" class="">print</span><span style="font-variant-ligatures: no-common-ligatures" class=""> arb_ds.field_list</span></div>
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And it returns an error: </div>
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Traceback (most recent call last):</div>
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<span style="font-variant-ligatures: no-common-ligatures" class=""> File "arbgrid_clean.py", line 16, in <module></span></div>
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<span style="font-variant-ligatures: no-common-ligatures" class=""> <b class="">
print arb_ds.field_list</b></span></div>
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<span style="font-variant-ligatures: no-common-ligatures" class=""> ...</span></div>
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<span style="font-variant-ligatures: no-common-ligatures" class=""> ...</span></div>
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<span style="font-variant-ligatures: no-common-ligatures" class=""> File "/Users/heavyfat/anaconda/lib/python2.7/site-packages/yt/frontends/ytdata/io.py", line 244, in _initialize_index</span></div>
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<span style="font-variant-ligatures: no-common-ligatures" class=""> pos[:,0] = _get_position_array(ptype, f, "x")</span></div>
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<span style="font-variant-ligatures: no-common-ligatures" class=""><b class="">ValueError: could not broadcast input array from shape (64,64,64) into shape (262144)</b></span></div>
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<span style="font-variant-ligatures: no-common-ligatures;" class="">So, how I can save/load a usable arbitrary grid dataset?</span></div>
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<span style="font-variant-ligatures: no-common-ligatures" class="">Thanks and looking forward to your suggestions.</span></div>
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<span style="font-variant-ligatures: no-common-ligatures" class="">Best regards,</span></div>
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<span style="font-variant-ligatures: no-common-ligatures;" class="">Qi </span></div>
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