yt-users March 2017

yt-users@python.org

21 participants
24 discussions

by david collins

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.

11 months

Import of crystallographic charge density data

by Matthew Horton

Hello all, I’m a new user to yt looking for some general guidance. 1. I have files describing the charge density in a crystal (CHGCAR files for any DFT/VASP users on the mailing list). I can import these with yt as generic (periodic) unigrid data, however the axes are not always orthogonal… In cubic crystals, `yt.load_uniform_grid` works perfectly, but in some crystals this would give a distorted visualization. What would be the best way to import this kind of data? 2. Regarding units, the units in my file are nominally fractional electrons per grid cell volume, e/Angstrom^3 … importing into yt as a density field, what units should I use? Would be good to keep the data in its natural units, rather than converting to SI/cgs, because they’d be very very small floats otherwise. I tried 'unit_system = yt.UnitSystem('custom', 'Angstrom', 'g', 's’)' and this works as expected for the length units in my plots, but how do I set the custom Charge unit? What ‘units’ string would I then use for the density field? It doesn’t seem to want to accept ‘Angstrom’, ‘C’ etc. Many thanks for any help! Best regards, Matthew

3 years, 11 months

Particle Velocity Magnitude without bulk velocity correction

by Reju Sam John

Dear all, I tried the following defination of Particle Velocity Magnitude without bulk velocity correction. def _ParticleVelocityMagnitudenoBVcor(field, data): return ( data["particle_velocity_x"]**2.0 + \ data["particle_velocity_y"]**2.0 + \ data["particle_velocity_z"]**2.0 )**(1.0/2.0) add_field("ParticleVelocityMagnitudenoBVcor", function=_ParticleVelocityMagnitudenoBVcor, take_log=False, units=r"\rm{cm/s}" ) and tried to calculate the weighted average value of it with the following line vrms_dm_no_bv_cor = sphere.quantities["WeightedAverageQuantity"]("ParticleVelocityMagnitudenoBVcor", "ParticleMass") But I am getting the following error IndexError: too many indices for array What could be the reason? How can I compute Particle Velocity Magnitude without bulk velocity correction? Thanks -- Reju Sam John

3 years, 11 months

phaseplot set zlim

by Stephanie Tonnesen

Hi yt-users, I am trying to make some nice looking phaseplots, and want to set the mass range that I show in the figure. I use set_zlim and instead of only showing the cells that call into that mass range, it just changes the color coding. You can see the attached for what I am talking about. Is there a way to have phaseplot only show me the cells that have "cell_mass" larger that 1e36 (or whatever I happen to set)? Thanks! Stephanie -- Dr. Stephanie Tonnesen Alvin E. Nashman Postdoctoral Fellow Carnegie Observatories, Pasadena, CA stonnes(a)gmail.com

3 years, 11 months

miniconda installation issue

by Wolfram Schmidt

Hi, I have encountered a problem when installing yt using the miniconda python distribution on a remote host. After downloading and installing various packages, the installation process gets stuck here (see also attached log file): EXECUTING: /home/h/hzfbhsws/yt-conda/bin/conda install -c conda-forge --yes yt Fetching package metadata ........... Solving package specifications: . CondaError: CondaHTTPError: HTTP None None for url <https://conda.anaconda.org/conda-forge/linux-64/conda-env-2.6.0-0.tar.bz2> Elapsed: None Indeed when I try wget https://conda.anaconda.org/conda-forge/linux-64/conda-env-2.6.0-0.tar.bz2 on the host on which I have been running the installation, the following error message is thrown: Connecting to s3.amazonaws.com|54.231.40.130|:443... failed: No route to host. On the local host (i.e. my PC), there is no problem with downloading the conda-env package with wget: Saving to: ‘conda-env-2.6.0-0.tar.bz2’ conda-env-2.6.0-0.tar.bz2 100%[===================================================================>] 1017 --.-KB/s in 0s 2017-03-28 12:18:08 (37,9 MB/s) - ‘conda-env-2.6.0-0.tar.bz2’ saved [1017/1017] Maybe the problem is related to port 443 on the host on which I want to install yt. In any case, how can I circumvent this? I can put the required package into the yt-conda/pkgs directory, but I haven't figured out how to tell the installation script to use the existing file rather than attempting to download it. Best regards, Wolfram

3 years, 11 months

Stacked temperature profiles

by Thor Andreas Seiff Ellewsen

Hi everyone. I'm currently working on making temperature and density profiles from some ramses simulations. I'd like to make these profiles the average radial profile of the halos in the simulation. I think the included rockstar in yt supports this in some form, but my halo catalog is made using AHF and then imported from an ascii file. To do this I need help with two things: The first one is how to scale the radius of each profile to the corresponding virial radius. The other is how to actually average all these profiles. Is this something that can be done? I will be trying to compare the resulting profile with the same for different simulations in the end, but I don't expect to have any big problems with that. The code I'm currently using for this can be found at http://paste.yt-project.org/show/7058/ Best, Andreas Ellewsen

3 years, 11 months

Re: [yt-users] cutting plane not working or changed

by Nathan Goldbaum

Yes, using a conda environment should work. It's up to you how you want to manage your install. The nightly conda builds might be useful for this purpose: http://yt-project.org/doc/installing.html#installing-yt-using-anaconda On Thu, Mar 16, 2017 at 7:55 AM Slavin, Jonathan <jslavin(a)cfa.harvard.edu> wrote: > Hi Nathan, > > As you can probably tell, our e-mails of yesterday crossed. > > I am willing to use the development branch of yt, though I'd prefer if > I could use it alongside the stable branch instead of replacing it. I > currently use anaconda. I suppose the way to go about that would be > to create a new environment. Maybe this is the motivation I need to > finally move to python 3.x. Any suggestions? > > Jon > > On Wed, Mar 15, 2017 at 5:06 PM, <yt-users-request(a)lists.spacepope.org> > wrote: > > Date: Wed, 15 Mar 2017 13:42:36 -0500 > > From: Nathan Goldbaum <nathan12343(a)gmail.com> > > To: Discussion of the yt analysis package > > <yt-users(a)lists.spacepope.org> > > Subject: Re: [yt-users] cutting plane not working or changed > > Message-ID: > > < > CAJXewOkmpm6U9XpeDu+Xgjf4xTLBig_4Ery1tPetKi4ThPkzYA(a)mail.gmail.com> > > Content-Type: text/plain; charset="utf-8" > > > > Ah, apologies for not checking how yt behaves on a stable release. I'm > able > > to reproduce the behavior you're seeing on yt 3.3.5. It looks like this > > behavior doesn't manifest itself on the yt branch, so it looks like some > > changes we've made have "fixed" this since we branched off for yt 3.4 > last > > summer. I suspect this has something to do with the pixelizers being > > rewritten to use compositing but I'd need to check in detail with hg > bisect > > to be sure. > > > > Can you try testing out the development version of yt? You should be able > > to build yt from source by uninstalling your current version of yt, > cloning > > the repository, checking out the "yt" branch, and running "python > setup.py > > develop". See this page for more details: > > > > > http://yt-project.org/docs/dev/installing.html#installing-yt-using-pip-or-f… > > > > Is the new behavior (wtihout the NaNs) what you expect? > > > > I might try to backport this to the stable branch, but given that a lot > of > > code has changed in the pixelizers it might be difficult to backport just > > this fix. Would you be ok with running on the development branch for now? > > I'd ideally like to get yt 3.4.0 out the door by this summer. > > > > > -- > ________________________________________________________ > Jonathan D. Slavin Harvard-Smithsonian CfA > jslavin(a)cfa.harvard.edu 60 Garden Street, MS 83 > phone: (617) 496-7981 Cambridge, MA 02138-1516 > cell: (781) 363-0035 USA > ________________________________________________________ >

3 years, 11 months

Re: [yt-users] cutting plane not working or changed

by Slavin, Jonathan

Hi Nathan, I think this may have to do with pixelization_routines.pyx. I noticed that the version I have (i.e. 3.3.5) differs significantly from that under the main yt branch on bitbucket, which seems more recent. (Is that the development branch?) In particular the 3.3.5 version is lacking "NOTE ON ROWS AND COLUMNS" in pixelize_off_axis_cartesian and associates the width with rows and height with columns: px_dx = width / (<np.float64_t> rows) px_dy = height / (<np.float64_t> cols) In the newer version the argument list is different and instead there is px_dx = width / (<np.float64_t> buff.shape[1]) px_dy = height / (<np.float64_t> buff.shape[0]) where, I believe buff corresponds to the argument to resolution, so resolution should be (h,w) which seems to contrast with the situation in the stable branch version. Jon On Wed, Mar 15, 2017 at 2:00 PM, <yt-users-request(a)lists.spacepope.org> wrote: > > Date: Wed, 15 Mar 2017 14:00:17 -0400 > From: "Slavin, Jonathan" <jslavin(a)cfa.harvard.edu> > To: yt-users(a)lists.spacepope.org > Subject: Re: [yt-users] cutting plane not working or changed > Message-ID: > <CACcRS=fo5KiYBdnu3EvEyuq5vA-UGFK4jRK1soPM-5E1LPWa-w(a)mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > ?Hi Nathan, > > I finally got around to testing your code on LodegIt that uses the > IsolatedGalaxy data. I ran it as is except I added some plotting > statements (using matplotlib) at the end. I again do get the problem of > NaNs: > > ?In [2]: run slice_prob_test.py > Parsing Hierarchy : 100%|??????????????????| 173/173 [00:00<00:00, > 23359.45it/s] > /export/slavin/python/anaconda/lib/python2.7/site-packages/yt/visualization/fixed_resolution.py:546: > RuntimeWarning: invalid value encountered in divide > bounds).transpose() > (nan g/cm**3, nan g/cm**3) > True > > ?Where the (nan g/cm**3... line is from the print(image.max()... > statement. Also np.any(np.isnan(image)) returns True. The image that is > produced is shown in the attached png file. > > The RuntimeWarning is apparently associated with this statement: > ?buff = pixelize_off_axis_cartesian( > self.data_source['x'], > self.data_source['y'], self.data_source['z'], > self.data_source['px'], > self.data_source['py'], > self.data_source['pdx'], > self.data_source['pdy'], self.data_source['pdz'], > self.data_source.center, > self.data_source._inv_mat, indices, > self.data_source[item], > self.buff_size[0], self.buff_size[1], > bounds).transpose() > > ?which is in the __getitem__ method of ?the ObliqueFixedResolutionBuffer > class. That's about all I could tell you at this point. > > The package versions I'm using are yt 3.3.5, python 2.7.12, matplotlib > 2.0.0 (running on Linux CentOS 6.8 if that matters). > > ?Regards, > Jon? > > > > On Fri, Mar 10, 2017 at 4:05 PM, <yt-users-request(a)lists.spacepope.org> > wrote: > > > Date: Fri, 10 Mar 2017 12:14:55 -0800 > > From: Nathan Goldbaum <nathan12343(a)gmail.com> > > To: Discussion of the yt analysis package > > <yt-users(a)lists.spacepope.org> > > Subject: Re: [yt-users] cutting plane not working or changed behavior > > Message-ID: > > <CAJXewOmWwY1CU4nrafG5_=GrAScGBnq=VMNxxh3s0OUzDzaGVw@ > > mail.gmail.com> > > Content-Type: text/plain; charset="utf-8" > > > > Hi Jonathan, > > > > I'm not able to reproduce the behavior you're seeing with a test dataset > > (e.g. see http://paste.yt-project.org/show/7080/, this uses a dataset from > > yt-project.org/data). > > > > Is there any chance you can share a dataset that triggers this? > > Alternatively, can you reproduce this using one of the test datasets on > > yt-project.org/data? > > > > The yt curldrop might be useful to share a dataset that triggers the issue > > you're seeing, see docs.hub.yt. If you're not comfortable sharing the > > dataset publicly, feel free to share it with me off-list. > > > > -Nathan > > -- ________________________________________________________ Jonathan D. Slavin Harvard-Smithsonian CfA jslavin(a)cfa.harvard.edu 60 Garden Street, MS 83 phone: (617) 496-7981 Cambridge, MA 02138-1516 cell: (781) 363-0035 USA ________________________________________________________

3 years, 11 months

Re: [yt-users] cutting plane not working or changed

by Slavin, Jonathan

Hi Nathan, I finally got around to testing your code on LodegIt that uses the IsolatedGalaxy data. I ran it as is except I added some plotting statements (using matplotlib) at the end. I again do get the problem of NaNs: In [2]: run slice_prob_test.py Parsing Hierarchy : 100%|██████████████████| 173/173 [00:00<00:00, 23359.45it/s] /export/slavin/python/anaconda/lib/python2.7/site-packages/yt/visualization/fixed_resolution.py:546: RuntimeWarning: invalid value encountered in divide bounds).transpose() (nan g/cm**3, nan g/cm**3) True Where the (nan g/cm**3... line is from the print(image.max()... statement. Also np.any(np.isnan(image)) returns True. The image that is produced is shown in the attached png file. The RuntimeWarning is apparently associated with this statement: buff = pixelize_off_axis_cartesian( self.data_source['x'], self.data_source['y'], self.data_source['z'], self.data_source['px'], self.data_source['py'], self.data_source['pdx'], self.data_source['pdy'], self.data_source['pdz'], self.data_source.center, self.data_source._inv_mat, indices, self.data_source[item], self.buff_size[0], self.buff_size[1], bounds).transpose() which is in the __getitem__ method of the ObliqueFixedResolutionBuffer class. That's about all I could tell you at this point. The package versions I'm using are yt 3.3.5, python 2.7.12, matplotlib 2.0.0 (running on Linux CentOS 6.8 if that matters). Regards, Jon On Fri, Mar 10, 2017 at 4:05 PM, <yt-users-request(a)lists.spacepope.org> wrote: > Date: Fri, 10 Mar 2017 12:14:55 -0800 > From: Nathan Goldbaum <nathan12343(a)gmail.com> > To: Discussion of the yt analysis package > <yt-users(a)lists.spacepope.org> > Subject: Re: [yt-users] cutting plane not working or changed behavior > Message-ID: > <CAJXewOmWwY1CU4nrafG5_=GrAScGBnq=VMNxxh3s0OUzDzaGVw@ > mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > Hi Jonathan, > > I'm not able to reproduce the behavior you're seeing with a test dataset > (e.g. see http://paste.yt-project.org/show/7080/, this uses a dataset from > yt-project.org/data). > > Is there any chance you can share a dataset that triggers this? > Alternatively, can you reproduce this using one of the test datasets on > yt-project.org/data? > > The yt curldrop might be useful to share a dataset that triggers the issue > you're seeing, see docs.hub.yt. If you're not comfortable sharing the > dataset publicly, feel free to share it with me off-list. > > -Nathan > -- ________________________________________________________ Jonathan D. Slavin Harvard-Smithsonian CfA jslavin(a)cfa.harvard.edu 60 Garden Street, MS 83 phone: (617) 496-7981 Cambridge, MA 02138-1516 cell: (781) 363-0035 USA ________________________________________________________

3 years, 11 months

Re: [yt-users] Extracting a list of star particles, their positions and masses from enzo

by Ari Maller

Hi Carla, You want to do something like the following import yt.mods as ytm from yt.data_objects.particle_filters import add_particle_filter def enzo_stars(pfilter,data): filter = data[('io', 'particle_type')] == 2 # DM = 1, Stars = 2 return filter ds=ytm.load(my_snapshot_name)) add_particle_filter("stars",function=enzo_stars,filtered_type='io',requires=["particle_type"]) ds.add_particle_filter("stars”) ad = ds.all_data() x=ad[(‘stars’,’particle_position_x’)] etc… using stars will now just return star particles. The fields will have to be fields in your file which you can check with ds.field_list. Ari > On Mar 14, 2017, at 11:32 AM, yt-users-request(a)lists.spacepope.org wrote: > > Send yt-users mailing list submissions to > yt-users(a)lists.spacepope.org > > To subscribe or unsubscribe via the World Wide Web, visit > http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org > or, via email, send a message with subject or body 'help' to > yt-users-request(a)lists.spacepope.org > > You can reach the person managing the list at > yt-users-owner(a)lists.spacepope.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of yt-users digest..." > > > Today's Topics: > > 1. Re: yt-users Digest, Vol 109, Issue 27 (Slavin, Jonathan) > 2. Re: Extracting a list of star particles, their positions and > masses from enzo (Carla Bernhardt) > 3. Re: Extracting a list of star particles, their positions and > masses from enzo (Nathan Goldbaum) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Tue, 14 Mar 2017 11:27:18 -0400 > From: "Slavin, Jonathan" <jslavin(a)cfa.harvard.edu> > To: yt-users(a)lists.spacepope.org > Subject: Re: [yt-users] yt-users Digest, Vol 109, Issue 27 > Message-ID: > <CACcRS=fSRQ=4THnqMR3jCDiup1rRcvfAEFPYaATup_92Df=DCQ(a)mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > ?Hi Nathan, > > I finally uploaded the data file to the curldrop site: > ?> curl -T > /data/plato/mmsnr/flash_data/run-3f818dc2/sedov_hdf5_plt_cnt_0200 > http://use.yt/upload/ > Stream body handler: received 467741048 bytes > http://use.yt/upload/147aa558 > > Tell me if you need more information about reproducing my issue. > > Thanks a lot, > Jon > > On Fri, Mar 10, 2017 at 4:05 PM, <yt-users-request(a)lists.spacepope.org> > wrote: > >> Date: Fri, 10 Mar 2017 12:14:55 -0800 >> From: Nathan Goldbaum <nathan12343(a)gmail.com> >> To: Discussion of the yt analysis package >> <yt-users(a)lists.spacepope.org> >> Subject: Re: [yt-users] cutting plane not working or changed behavior >> Message-ID: >> <CAJXewOmWwY1CU4nrafG5_=GrAScGBnq=VMNxxh3s0OUzDzaGVw@ >> mail.gmail.com> >> Content-Type: text/plain; charset="utf-8" >> >> Hi Jonathan, >> >> I'm not able to reproduce the behavior you're seeing with a test dataset >> (e.g. see http://paste.yt-project.org/show/7080/, this uses a dataset from >> yt-project.org/data). >> >> Is there any chance you can share a dataset that triggers this? >> Alternatively, can you reproduce this using one of the test datasets on >> yt-project.org/data? >> >> The yt curldrop might be useful to share a dataset that triggers the issue >> you're seeing, see docs.hub.yt. If you're not comfortable sharing the >> dataset publicly, feel free to share it with me off-list. >> >> -Nathan >> > > > > > -- > ________________________________________________________ > Jonathan D. Slavin Harvard-Smithsonian CfA > jslavin(a)cfa.harvard.edu 60 Garden Street, MS 83 > phone: (617) 496-7981 Cambridge, MA 02138-1516 > cell: (781) 363-0035 USA > ________________________________________________________ > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: <http://lists.spacepope.org/pipermail/yt-users-spacepope.org/attachments/201…> > > ------------------------------ > > Message: 2 > Date: Tue, 14 Mar 2017 16:28:17 +0100 > From: Carla Bernhardt <carla.j.bernhardt(a)gmail.com> > To: Discussion of the yt analysis package > <yt-users(a)lists.spacepope.org> > Subject: Re: [yt-users] Extracting a list of star particles, their > positions and masses from enzo > Message-ID: > <CAKQMXAVTzJ9Y2D7xXWHHg+2HXpWY4=7RzSfHoJPwosYGSMsx-g(a)mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > Nathan, > > Yes, of course. Here is what I tried > <http://paste.yt-project.org/show/7082/> and here is the error message > <http://paste.yt-project.org/show/7084/> I get. What I tried might not be > the right way to get this list, but I was hoping someone else has done this > before and has some insight. > > Best, > Carla > > 2017-03-14 16:00 GMT+01:00 Nathan Goldbaum <nathan12343(a)gmail.com>: > >> Hi Carla, >> >> Can you share the script you're running and the full error message and >> traceback you're seeing? If you can, it helps if you can make your script >> that triggers your issue as minimal as possible. >> >> We have the yt pastebin set up for sharing snippets of code and text: >> paste.yt-project.org. >> >> -Nathan >> >> On Tue, Mar 14, 2017 at 2:30 AM, Carla Bernhardt < >> carla.j.bernhardt(a)gmail.com> wrote: >> >>> Dear yt users, >>> >>> I am trying to extract a list of star particles and their positions and >>> masses from enzo. This seems to be right along the lines of this tutorial >>> <http://yt-project.org/doc/analyzing/fields.html>, but I am still stuck. >>> If I try >>> >>> print(ad["dark_matter", "particle_position"]) >>> print(ad["stars", "particle_position"]) >>> print(ad["black_holes", "particle_position"]) >>> >>> I get that none of these fields are available in my provided data. I am >>> using Stochastic Star Formation with a MBH inserted (i.e. >>> StarParticleCreation=514). >>> >>> Thanks in advance, >>> Carla Bernhardt >>> PhD Student >>> Universit?t Heidelberg >>> ZAH Institut f?r Theoretische Astrophysik >>> >>> >>> _______________________________________________ >>> yt-users mailing list >>> yt-users(a)lists.spacepope.org >>> http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org >>> >>> >> >> _______________________________________________ >> yt-users mailing list >> yt-users(a)lists.spacepope.org >> http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org >> >> > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: <http://lists.spacepope.org/pipermail/yt-users-spacepope.org/attachments/201…> > > ------------------------------ > > Message: 3 > Date: Tue, 14 Mar 2017 10:32:00 -0500 > From: Nathan Goldbaum <nathan12343(a)gmail.com> > To: Discussion of the yt analysis package > <yt-users(a)lists.spacepope.org> > Subject: Re: [yt-users] Extracting a list of star particles, their > positions and masses from enzo > Message-ID: > <CAJXewO=sCXCpFn1bpsSL3vK9AjiA7OMwPy5SRAmb8Lp09XDhzQ(a)mail.gmail.com> > Content-Type: text/plain; charset="utf-8" > > You need to define some particle filters. Enzo only has one on-disk > particle type. Particle filters let you define new particle types based on > some filtering criterion. For Enzo it's usually sufficient to filter on the > ('io', 'particle_type') field. > > There is an example of adding a particle filter with enzo data in the docs > here: > > http://yt-project.org/docs/dev/cookbook/calculating_information.html#using-… > > And more information on particle filters here: > > http://yt-project.org/docs/dev/analyzing/filtering.html?highlight=filter#fi… > > The Enzo frontend does not predefine any particle fields since we don't > want to accidentally cause users to generate anaylsis or visualization > results based on a particle filter definition that does not apply to all > data types. > > -Nathan > > On Tue, Mar 14, 2017 at 10:28 AM, Carla Bernhardt < > carla.j.bernhardt(a)gmail.com> wrote: > >> Nathan, >> >> Yes, of course. Here is what I tried >> <http://paste.yt-project.org/show/7082/> and here is the error message >> <http://paste.yt-project.org/show/7084/> I get. What I tried might not be >> the right way to get this list, but I was hoping someone else has done this >> before and has some insight. >> >> Best, >> Carla >> >> 2017-03-14 16:00 GMT+01:00 Nathan Goldbaum <nathan12343(a)gmail.com>: >> >>> Hi Carla, >>> >>> Can you share the script you're running and the full error message and >>> traceback you're seeing? If you can, it helps if you can make your script >>> that triggers your issue as minimal as possible. >>> >>> We have the yt pastebin set up for sharing snippets of code and text: >>> paste.yt-project.org. >>> >>> -Nathan >>> >>> On Tue, Mar 14, 2017 at 2:30 AM, Carla Bernhardt < >>> carla.j.bernhardt(a)gmail.com> wrote: >>> >>>> Dear yt users, >>>> >>>> I am trying to extract a list of star particles and their positions and >>>> masses from enzo. This seems to be right along the lines of this >>>> tutorial <http://yt-project.org/doc/analyzing/fields.html>, but I am >>>> still stuck. If I try >>>> >>>> print(ad["dark_matter", "particle_position"]) >>>> print(ad["stars", "particle_position"]) >>>> print(ad["black_holes", "particle_position"]) >>>> >>>> I get that none of these fields are available in my provided data. I am >>>> using Stochastic Star Formation with a MBH inserted (i.e. >>>> StarParticleCreation=514). >>>> >>>> Thanks in advance, >>>> Carla Bernhardt >>>> PhD Student >>>> Universit?t Heidelberg >>>> ZAH Institut f?r Theoretische Astrophysik >>>> >>>> >>>> _______________________________________________ >>>> yt-users mailing list >>>> yt-users(a)lists.spacepope.org >>>> http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org >>>> >>>> >>> >>> _______________________________________________ >>> yt-users mailing list >>> yt-users(a)lists.spacepope.org >>> http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org >>> >>> >> >> _______________________________________________ >> yt-users mailing list >> yt-users(a)lists.spacepope.org >> http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org >> >> > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: <http://lists.spacepope.org/pipermail/yt-users-spacepope.org/attachments/201…> > > ------------------------------ > > Subject: Digest Footer > > _______________________________________________ > yt-users mailing list > yt-users(a)lists.spacepope.org > http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org > > > ------------------------------ > > End of yt-users Digest, Vol 109, Issue 33 > *****************************************

3 years, 11 months

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yt-users March 2017