yt-users January 2016

yt-users@python.org

19 participants
33 discussions

Porting .ply files to Blender with colors?
by Jill P. Naiman 14 Aug '22

14 Aug '22

Hi All, I was curious if anyone has had any luck porting .ply files generated with yt into Blender with colors? It seems to port in the surfaces just fine, but they are a uniform color. From what I can gather, Blender imports .ply files with face color instead of vertex so I tried the surf.export_ply routine with "face" instead of "vertex" for sample_type, but no luck ("vertex" doesn't work either). Let me know if I can provide any more useful info. Thanks for any help, -J

3 2

Stars on volume rendering
by Elizabeth Harper-Clark 11 Dec '21

11 Dec '21

Hi all, Thanks for all your help over the last couple of days. One more question: - Can I plot particles on a volume rendered image? I have stars and I want to show where they are! Thanks, Libby -- Elizabeth Harper-Clark MA MSci PhD Candidate, Canadian Institute for Theoretical Astrophysics, UofT Sciences and Engineering Coordinator, Teaching Assistants' Training Program, UofT www.astro.utoronto.ca/~h-clark <http://www.astro.utoronto.ca/%7Eh-clark> h-clark(a)cita.utoronto.ca Astronomy office phone: +1-416-978-5759

8 14

Variance in phase/profiles
by david collins 11 Apr '20

11 Apr '20

Hi, Everybody! Does anyone out there have a technique for getting the variance out of a profile object? A profile object is good at getting <X> vs. B, I'd then like to get < (X - <X>)^2 > vs B. Matt and I had spittballed the possibility some time ago, but I was wondering if anyone out there had successfully done it. Thanks, d. -- Sent from my computer.

6 8

Problem when run yt dev in parallel on Blue Waters
by Pengfei Chen 22 Aug '16

22 Aug '16

Hi all, I have trouble running yt in parallel on Blue Waters. I installed yt using miniconda, the version of yt is ~/miniconda/lib $yt version yt module located at: /u/sciteam/madcpf/miniconda/lib/python2.7/site-packages/yt-3.3.dev0-py2.7-linux-x86_64.egg The current version and changeset for the code is: --- Version = 3.3-dev Changeset = 90f900be7a36+ yt Then with miniconda/bin in PATH I installed mpi4py-2.0.0. But when I tried to make the following simple output in parallel, I get: import yt yt.enable_parallelism() from yt.utilities.parallel_tools.parallel_analysis_interface import\ parallel_objects, communication_system comm = communication_system.communicators[-1] print comm.rank, comm.size 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 ... When I run a similar code but with yt-2.x also on Blue Waters, I get what I expect: 7 16 15 16 6 16 9 16 11 16 8 16 0 16 4 16 ... I'm confused about it. Could anyone give me some suggestions please? Thanks, Pengfei

3 11

Covering Grid Dimensions: multiple refinement levels
by Carla Bernhardt 05 Apr '16

05 Apr '16

Dear YT Users, To better understand covering_grid (or smoothed_covering_grid), can someone explain what dimensions I should use when I have multiple levels of refinement? If I have 1 level of refinement from AMR data, the dimensions should be the same, I believe, but what if I have 2 or 3 levels of refinement? Should the fixed resolution region then have dimensions of dims*2^2 and dims*3^2 respectively? Here is one example from a tutorial <http://yt-project.org/doc/examining/low_level_inspection.html#examining-gri…> if that helps isolate my question: all_data_level_2 = ds.covering_grid(level=2, left_edge=[0,0.0,0.0], dims=ds.domain_dimensions * 2**2) Thanks in advance, Carla

3 14

yt-3.2.1 installation error
by Muhammad Latif 07 Mar '16

07 Mar '16

Hi all, I'm getting the following error while installing yt-3.2.1 latest release. Any idea what is going on here? thanks in advance, cheers Latif Installing nose-1.3.6 Installing python-hglib-1.6 Installing sympy-0.7.6 Doing yt update, wiping local changes and updating to branch stable install_script.sh: line 1025: cd: /home/latif/YT/yt-x86_64/src/yt-hg/: No such file or directory Installing yt ******************************************** FAILURE REPORT: ******************************************** running install_data copying doc/man/isympy.1 -> /home/latif/YT/yt-x86_64/share/man/man1 running install_egg_info Writing /home/latif/YT/yt-x86_64/lib/python2.7/site-packages/sympy-0.7.6-py2.7.egg-info Collecting jinja2 Using cached Jinja2-2.8-py2.py3-none-any.whl Collecting MarkupSafe (from jinja2) Installing collected packages: MarkupSafe, jinja2 Successfully installed MarkupSafe-0.23 jinja2-2.8 /home/latif/YT/yt-x86_64/bin/python2.7: can't open file 'setup.py': [Errno 2] No such file or directory ******************************************** ******************************************** Failure. Check /home/latif/YT/yt-x86_64/yt_install.log. The last 10 lines are above.

2 1

Pyx + Tex
by John Regan 24 Feb '16

24 Feb '16

Hi All, I recently moved to working on a new machine and I've run into problems with eps_writer and pyx and tex. It seems pyx and tex are not talking to one another. I know pyx can sometimes have an iffy relationship with tex but does anyone know how to make them like each other? This is the output I get. yt : [INFO ] 2015-11-25 14:51:23,198 xlim = 0.456408 0.541884 yt : [INFO ] 2015-11-25 14:51:23,198 ylim = 0.482775 0.568251 yt : [INFO ] 2015-11-25 14:51:23,200 Making a fixed resolution buffer of (('gas', 'H_number_density')) 800 by 800 Create Multiplot.... yt : [WARNING ] 2015-11-25 14:51:24,085 No field specified. Choosing first field (('gas', 'H2_fraction')) yt : [WARNING ] 2015-11-25 14:51:24,955 No field specified. Choosing first field (('gas', 'H_number_density')) still waiting for tex after 5 (of 60) seconds... still waiting for tex after 10 (of 60) seconds... still waiting for tex after 15 (of 60) seconds... still waiting for tex after 20 (of 60) seconds... still waiting for tex after 25 (of 60) seconds... still waiting for tex after 30 (of 60) seconds... still waiting for tex after 35 (of 60) seconds... still waiting for tex after 40 (of 60) seconds... still waiting for tex after 45 (of 60) seconds... still waiting for tex after 50 (of 60) seconds... still waiting for tex after 55 (of 60) seconds... the timeout of 60 seconds expired and tex did not respond. We try to finish the dvi due to an unhandled tex error still waiting for tex after 5 (of 60) seconds... still waiting for tex after 10 (of 60) seconds... still waiting for tex after 15 (of 60) seconds... still waiting for tex after 20 (of 60) seconds... still waiting for tex after 25 (of 60) seconds... still waiting for tex after 30 (of 60) seconds... still waiting for tex after 35 (of 60) seconds... still waiting for tex after 40 (of 60) seconds... still waiting for tex after 45 (of 60) seconds... still waiting for tex after 50 (of 60) seconds... still waiting for tex after 55 (of 60) seconds... the timeout of 60 seconds expired and tex did not respond. Traceback (most recent call last): File "OnAxisMultiPlot_TimeSeries.py", line 173, in <module> figsize=(8,4), shrink_cb=1.8) File "/cosma/home/jregan/YT/yt-x86_64/src/yt-hg/yt/visualization/eps_writer.py", line 1164, in multiplot bbox = (100.0 * d.canvas.bbox().left().t, File "/cosma/home/jregan/YT/yt-x86_64/lib/python2.7/site-packages/pyx/canvas.py", line 156, in bbox obbox += cmd.bbox() File "/cosma/home/jregan/YT/yt-x86_64/lib/python2.7/site-packages/pyx/graph/graph.py", line 181, in bbox self.finish() File "/cosma/home/jregan/YT/yt-x86_64/lib/python2.7/site-packages/pyx/graph/graph.py", line 311, in finish self.doaxes() File "/cosma/home/jregan/YT/yt-x86_64/lib/python2.7/site-packages/pyx/graph/graph.py", line 588, in doaxes self.dolayout() File "/cosma/home/jregan/YT/yt-x86_64/lib/python2.7/site-packages/pyx/graph/graph.py", line 572, in dolayout self.doaxiscreate(axisname) File "/cosma/home/jregan/YT/yt-x86_64/lib/python2.7/site-packages/pyx/graph/graph.py", line 248, in doaxiscreate self.axes[axisname].create() File "/cosma/home/jregan/YT/yt-x86_64/lib/python2.7/site-packages/pyx/graph/axis/axis.py", line 586, in create self.canvas = self.axis.create(self.data, self.positioner, self.graphtexrunner, self.errorname) File "/cosma/home/jregan/YT/yt-x86_64/lib/python2.7/site-packages/pyx/graph/axis/axis.py", line 245, in create return _regularaxis._create(self, data, positioner, graphtexrunner, self.parter, self.rater, errorname) File "/cosma/home/jregan/YT/yt-x86_64/lib/python2.7/site-packages/pyx/graph/axis/axis.py", line 146, in _create return layout(data) File "/cosma/home/jregan/YT/yt-x86_64/lib/python2.7/site-packages/pyx/graph/axis/axis.py", line 141, in layout self.painter.paint(canvas, data, self, positioner) File "/cosma/home/jregan/YT/yt-x86_64/lib/python2.7/site-packages/pyx/graph/axis/painter.py", line 258, in paint _title.paint(self, canvas, data, axis, axispos) File "/cosma/home/jregan/YT/yt-x86_64/lib/python2.7/site-packages/pyx/graph/axis/painter.py", line 109, in paint title = canvas.layer("title").text_pt(x, y, axis.title, titleattrs) File "/cosma/home/jregan/YT/yt-x86_64/lib/python2.7/site-packages/pyx/canvas.py", line 334, in text_pt return self.insert(self.texrunner.text_pt(x, y, atext, *args)) File "/cosma/home/jregan/YT/yt-x86_64/lib/python2.7/site-packages/pyx/text.py", line 1223, in text_pt return self.text(x * unit.t_pt, y * unit.t_pt, expr, *args, **kwargs) File "/cosma/home/jregan/YT/yt-x86_64/lib/python2.7/site-packages/pyx/text.py", line 1201, in text raise e pyx.text.TexResultError: TeX didn't respond as expected within the timeout period (60 seconds). The expression passed to TeX was: \scrollmode \raiseerror% \def\PyX{P\kern-.3em\lower.5ex\hbox{Y}\kern-.18em X}% \gdef\PyXBoxHAlign{0}% \newbox\PyXBox% \newbox\PyXBoxHAligned% \newdimen\PyXDimenHAlignLT% \newdimen\PyXDimenHAlignRT% \gdef\PyXFlushHAlign{0}% \def\PyXragged{% \leftskip=0pt plus \PyXFlushHAlign fil% \rightskip=0pt plus 1fil% \advance\rightskip0pt plus -\PyXFlushHAlign fil% \parfillskip=0pt% \pretolerance=9999% \tolerance=9999% \parindent=0pt% \hyphenpenalty=9999% \exhyphenpenalty=9999}% \newbox\PyXBoxVBox% \newdimen\PyXDimenVBox% \newbox\PyXBoxVAlign% \newdimen\PyXDimenVAlign% \newdimen\PyXDimenVShift% \long\def\ProcessPyXBox#1#2{% \setbox\PyXBox=\hbox{{#1}}% \PyXDimenHAlignLT=\PyXBoxHAlign\wd\PyXBox% \PyXDimenHAlignRT=\wd\PyXBox% \advance\PyXDimenHAlignRT by -\PyXDimenHAlignLT% \gdef\PyXBoxHAlign{0}% \immediate\write16{PyXBox:page=#2,lt=\the\PyXDimenHAlignLT,rt=\the\PyXDimenHAlignRT,ht=\the\ht\PyXBox,dp=\the\dp\PyXBox:}% \setbox\PyXBoxHAligned=\hbox{\kern-\PyXDimenHAlignLT\box\PyXBox}% \ht\PyXBoxHAligned0pt% {\count0=80\count1=121\count2=88\count3=#2\shipout\box\PyXBoxHAligned}}% \def\PyXInput#1{\immediate\write16{PyXInputMarker:executeid=#1:}}% \def\PyXMarker#1{\hskip0pt\special{PyX:marker #1}}%% \PyXInput{1}% After parsing the return message from TeX, the following was left: This is TeX, Version 3.14159265 (TeX Live 2015) (preloaded format=tex) Error in atexit._run_exitfuncs: Traceback (most recent call last): File "/cosma/home/jregan/YT/yt-x86_64/lib/python2.7/atexit.py", line 24, in _run_exitfuncs func(*targs, **kargs) File "/cosma/home/jregan/YT/yt-x86_64/lib/python2.7/site-packages/pyx/text.py", line 744, in _cleantmp texrunner.expectqueue.put_nowait(None) # do not expect any output anymore File "/cosma/home/jregan/YT/yt-x86_64/lib/python2.7/Queue.py", line 148, in put_nowait return self.put(item, False) File "/cosma/home/jregan/YT/yt-x86_64/lib/python2.7/Queue.py", line 123, in put raise Full Full Error in sys.exitfunc: Traceback (most recent call last): File "/cosma/home/jregan/YT/yt-x86_64/lib/python2.7/atexit.py", line 24, in _run_exitfuncs func(*targs, **kargs) File "/cosma/home/jregan/YT/yt-x86_64/lib/python2.7/site-packages/pyx/text.py", line 744, in _cleantmp texrunner.expectqueue.put_nowait(None) # do not expect any output anymore File "/cosma/home/jregan/YT/yt-x86_64/lib/python2.7/Queue.py", line 148, in put_nowait return self.put(item, False) File "/cosma/home/jregan/YT/yt-x86_64/lib/python2.7/Queue.py", line 123, in put raise Full Queue.Full The call I make is: multi = eps.multiplot(NCOLS, NROWS, projections, bare_axes=True,cb_labels=colorbar_label, figsize=(8,4), shrink_cb=1.8) Cheers, John

3 4

EnzoDatasetInMemory not working in parallel
by Britton Smith 24 Feb '16

24 Feb '16

Hi all, I've recently been trying to use yt's inline analysis functionality with Enzo and am having some difficultly getting it to work in parallel. I am using the development tip of yt. In serial, everything works fine, but in parallel, I get the following error: http://paste.yt-project.org/show/5694/ It seems that the issue is that yt is not correctly identifying which grids are available on a given processory for the EnzoDatasetInMemory object. Does anyone have an idea of how to fix this? Has anyone else seen this? For reference, my user_script is just this: import yt from yt.frontends.enzo.api import EnzoDatasetInMemory def main(): ds = EnzoDatasetInMemory() ad = ds.all_data() print ad.quantities.total_quantity("cell_mass") Thanks for any help, Britton

3 9

DM density profiles
by Junhwan Choi (최준환) 03 Feb '16

03 Feb '16

Hi yt user, I make a simple DM and gas density profile for my enzo simulation with following script: ====================== import matplotlib as matplotlib matplotlib.use('Agg') import yt import yt.units as units import numpy as np import matplotlib.pyplot as plt def _radiuspc(field, data): return data[('radius')].in_units('pc') yt.add_field('radiuspc', function=_radiuspc, units="pc") Nbin= 100 rmax = 4000 index = 60 ds = yt.load("../DD%04d/DD%04d" % (index,index)) ds.index ad= ds.all_data() center = ds.find_max(("gas", "density"))[1] my_sphere = ds.sphere(center, rmax*units.pc) rmin = max([1.0e-4,2.0*ds.index.get_smallest_dx().in_units('pc')]) profile = yt.Profile1D(my_sphere, 'radiuspc', Nbin, x_min=rmin, x_max=rmax, x_log=True, weight_field='cell_volume') profile.add_fields(('gas','density')) profile.add_fields(('gas','dark_matter_density')) profile.add_fields(('deposit','all_density')) plt.plot(np.log10(profile.x), np.log10(profile[('gas','density')]), label="('gas','density')", linestyle="-", color='g') plt.plot(np.log10(profile.x), np.log10(profile[('gas','dark_matter_density')]), label="('gas','dark_matter_density')", linestyle="-", color='r') plt.plot(np.log10(profile.x), np.log10(profile[('deposit','all_density')]), label="('deposit','all_density')", linestyle="-", color='b') plt.legend(loc=0,prop={'size':9}) plt.savefig('DMTest') ====================== The only particle in the simulation is the dark matter so that profile[('gas','dark_matter_density')] and profile[('deposit','all_density')] should be same. However, as shown in the attached figure, they are very different. I would like to ask a few questions regarding to this plot. 1) Why do profile[('gas','dark_matter_density')] and profile[('deposit','all_density')] show significant difference? 2) What limit the minimum r in profile[('deposit','all_density')]? 3) If I would like to make total density profile, what do I do? I think that profile[('deposit','all_density')] is more liable result. Can I add data[('gas','density')] and data[('deposit','all_density')], two different field types, in the derived field? Thank you in advance, Junhwan Choi _______________________________________________ yt-users mailing list yt-users(a)lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org

2 4

Can I specify the particle type when loading data?
by Bili Dong - Gmail 03 Feb '16

03 Feb '16

Hi yt users, I'm working with a particle dataset and I'm wondering if it is possible to only load a certain type of particle fields from the snapshot as my dataset? For example, there might be 'PartType0' and 'PartType1' in the snapshot, but I only want to load 'PartType0'. The reason I want to do this is that, to my understanding, the octree of the particle dataset is constructed adaptively according to the number of particles, including all types of particles in the dataset. But I want the octree constructed only according to the type of particles I'm interested in. Is it possible? Thanks, Bili

2 1

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