<meta http-equiv="Content-Type" content="text/html; charset=utf-8"><div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote">On Tue, Dec 16, 2014 at 2:32 PM, David Collins <span dir="ltr"><<a href="mailto:dcollins4096@gmail.com" target="_blank">dcollins4096@gmail.com</a>></span> wrote:<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi there--<div><br></div><div>I'm doing something wrong with clumps in yt3, and can't quite figure out what I"m doing. When I make some clumps, the field 'density' shows up, but no other fields seem to be well defined. Is this a familiar error to anyone? What I'm doing is the following:</div><div><br></div><div>I make some clumps from a sphere, similar to what's in the docs (details at the end of the email), and when I do <br></div><div>>>> leaf_clumps[n]['density']</div><div>I get something sensical. But if I do</div><div>>>> leaf_clumps[n]['cell_mass']</div><div><div>YTArray([], dtype=float64) g</div></div><div><br></div><div>I get this empty array. </div></div></blockquote><div><br></div><div>Not sure why this is happening. Any chance you can reproduce it using one of the test datasets on <a href="http://yt-project.org/data">yt-project.org/data</a>?</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><br></div><div>If I instead try quantities.total_mass(), I get an odd error. </div><div><div>>>> leaf_clumps[22].quantities.total_mass()</div><div>Traceback (most recent call last):</div><div> File "<stdin>", line 1, in <module></div><div> File "/home/dcollins4096/local-yt-2014-08-27/src/yt-hg/yt/data_objects/derived_quantities.py", line 193, in __call__</div><div> rv = super(TotalMass, self).__call__(fields)</div><div> File "/home/dcollins4096/local-yt-2014-08-27/src/yt-hg/yt/data_objects/derived_quantities.py", line 160, in __call__</div><div> rv = super(TotalQuantity, self).__call__(fields)</div><div> File "/home/dcollins4096/local-yt-2014-08-27/src/yt-hg/yt/data_objects/derived_quantities.py", line 56, in __call__</div><div> sto.result = self.process_chunk(ds, *args, **kwargs)</div><div> File "/home/dcollins4096/local-yt-2014-08-27/src/yt-hg/yt/data_objects/derived_quantities.py", line 166, in process_chunk</div><div> for field in fields]</div><div> File "/home/dcollins4096/local-yt-2014-08-27/src/yt-hg/yt/data_objects/data_containers.py", line 248, in __getitem__</div><div> self.get_data(f)</div><div> File "/home/dcollins4096/local-yt-2014-08-27/src/yt-hg/yt/data_objects/selection_data_containers.py", line 749, in get_data</div><div> raise YTMixedCutRegion(self.conditionals, field)</div><div>yt.utilities.exceptions.YTMixedCutRegion: Can't mix particle/discrete and fluid/mesh conditions or</div><div> quantities. Field: ('all', 'particle_mass') and Conditions specified:</div><div> obj['contours_8d0408a91fc34e2bbe9eb838d48de46e'] == 1</div></div></div></blockquote><div><br></div><div>This is happening because, as the error indicates, you can't combine mesh and particle quantities in a cut_region (like a clump is). The total_mass() quantity returns the total mass in particles and gas, so that's what's triggering the error. I bet this would work if you asked for the total gas mass only. Of course, that would only work if clump['cell_mass'] returned something sensible.</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><br></div><div><br></div><div><br></div><div>I build the clumps in the following manner. I don't have any validators by design. Plotting the clumps with annotate_clumps(leaf_clumps) gives reasonable results. </div><div><br></div><div><div> ds = yt.load(setname)</div><div> loc = ds.arr([ 0.03613281, 0.79589844, 0.03027344], 'code_length')<br></div><div> width = (0.05,'code_length')</div><div> sphere = ds.sphere(loc,width)</div><div> master_clump = Clump(sphere,"density")</div><div>use_particles=False, use_thermal_energy=False)<br></div><div> c_min = sphere["gas", "density"].min()</div><div> c_max = sphere["gas", "density"].max()</div><div> step = 2.0</div><div> find_clumps(master_clump, c_min, c_max, step)</div><div> leaf_clumps = get_lowest_clumps(master_clump)<br></div><div><br></div><div>Thanks a ton!</div><span class="HOEnZb"><font color="#888888"><div>d.</div><div><br></div>-- <br><div><div dir="ltr">-- Sent from a computer.<br></div></div>
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