[yt-users] volume rendering colorbar issue

[Nathan Goldbaum]

Thanks for narrowing down where to look. The issue was in the get_label
function. I've proposed a PR to fix this here:
https://bitbucket.org/yt_analysis/yt/pull-requests/1695/use-the-nice-latex-representation-for/diff

On Wed, Aug 12, 2015 at 2:03 AM, Stephanie Tonnesen <stonnes at gmail.com>
wrote:

> Actually, it looks like camera.py is calling get_label, which does try to
> latex-up the units.  Could it be that the command r"$g/cm**3$" will not
> work and what the label input needs is r"$g/cm^3$"?  Just double-checked in
> my own python code, and even though I am not actually sure how to fix it, I
> bet that is the issue!
>
> -Stephanie
>
> --
> Dr. Stephanie Tonnesen
> Alvin E. Nashman Postdoctoral Fellow
> Carnegie Observatories, Pasadena, CA
> stonnes at gmail.com
>
> On Tue, Aug 11, 2015 at 11:44 PM, Stephanie Tonnesen <stonnes at gmail.com>
> wrote:
>
>> Yeah, I cant figure out where it is being set either--I am certainly not
>> consciously setting it in my script!  I will look into it more tomorrow.
>> Thanks,
>>
>> Stephanie
>>
>> --
>> Dr. Stephanie Tonnesen
>> Alvin E. Nashman Postdoctoral Fellow
>> Carnegie Observatories, Pasadena, CA
>> stonnes at gmail.com
>>
>> On Tue, Aug 11, 2015 at 10:16 PM, Nathan Goldbaum <nathan12343 at gmail.com>
>> wrote:
>>
>>> You can get a nice LaTeX rendering of the units for any YTarray or
>>> YTQuantity like so:
>>>
>>> In [9]: from yt.units import g,cm
>>>
>>> In [10]: g/cm**3
>>> Out[10]: 1.0 g/cm**3
>>>
>>> In [11]: type(g/cm**3)
>>> Out[11]: yt.units.yt_array.YTQuantity
>>>
>>> In [12]: (g/cm**3).units.latex_representation()
>>> Out[12]: '\\frac{\\rm{g}}{\\rm{cm}^{3}}'
>>>
>>> I'm not sure where in the code the colorbar unit is getting generated,
>>> but right now it's displaying str(unit) instead of
>>> str(unit.latex_representation()).
>>>
>>> Hope that helps,
>>>
>>> Nathan
>>>
>>> On Wed, Aug 12, 2015 at 12:05 AM, Stephanie Tonnesen <stonnes at gmail.com>
>>> wrote:
>>>
>>>> Dear Michael,
>>>>
>>>> That did the trick!  Thanks very much!  Since that worked so well, is
>>>> there a way I can get the density units to look a bit nicer (actually have
>>>> the "3" superscript instead of "cm**3"?)  Thanks again,
>>>>
>>>> Stephanie
>>>>
>>>> --
>>>> Dr. Stephanie Tonnesen
>>>> Alvin E. Nashman Postdoctoral Fellow
>>>> Carnegie Observatories, Pasadena, CA
>>>> stonnes at gmail.com
>>>>
>>>> On Tue, Aug 11, 2015 at 2:06 PM, Cameron Hummels <chummels at gmail.com>
>>>> wrote:
>>>>
>>>>> I don't believe Stephanie is using the new VR interface for this
>>>>> problem.
>>>>>
>>>>> On Tue, Aug 11, 2015 at 2:04 PM, Michael Zingale <
>>>>> michael.zingale at stonybrook.edu> wrote:
>>>>>
>>>>>> A while back I added a label_fmt argument to save_annotated:
>>>>>>
>>>>>>         label_fmt : str, optional
>>>>>>
>>>>>>            A format specifier (e.g., label_fmt="%.2g") to use in
>>>>>> formatting
>>>>>>            the data values that label the transfer function colorbar.
>>>>>>
>>>>>>
>>>>>> this fixed the values for me so they look reasonable.
>>>>>>
>>>>>> Note: I don't think any of this has made it over to the new VR
>>>>>> interface.
>>>>>>
>>>>>> On Tue, Aug 11, 2015 at 2:42 PM, Stephanie Tonnesen <
>>>>>> stonnes at gmail.com> wrote:
>>>>>>
>>>>>>> Hi yt-users,
>>>>>>>
>>>>>>> My last attempt was too big to make it to the user list, so I will
>>>>>>> try again!
>>>>>>> I am trying to make a volume rendering using
>>>>>>> ---
>>>>>>> Version = 3.2-dev
>>>>>>> Changeset = dc2467c4eae7 (yt) tip
>>>>>>> ---
>>>>>>> and basically following this example:
>>>>>>>
>>>>>>> http://bender.astro.sunysb.edu/random/vol_rotate.py
>>>>>>>
>>>>>>> My problem is that the units are wonky on my colorbar.  I input them
>>>>>>> in my transfer function as cgs, and the peaks seem to be in the right place
>>>>>>> based on my input range and sample values.  Can I get the colorbar to
>>>>>>> present the density values in cgs?  You can see the colorbar and the code
>>>>>>> attached.
>>>>>>>
>>>>>>> Oh, I had to add in the line
>>>>>>> matplotlib.use('pdf')
>>>>>>> because I was getting a _tkinter can't find your screen error
>>>>>>> everytime I tried to add the colorbar.  I think it was a matplotlib with my
>>>>>>> computer problem.
>>>>>>>
>>>>>>> Thanks!
>>>>>>>
>>>>>>> Stephanie
>>>>>>> --
>>>>>>> Dr. Stephanie Tonnesen
>>>>>>> Alvin E. Nashman Postdoctoral Fellow
>>>>>>> Carnegie Observatories, Pasadena, CA
>>>>>>> stonnes at gmail.com
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> yt-users mailing list
>>>>>>> yt-users at lists.spacepope.org
>>>>>>> http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org
>>>>>>>
>>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> Michael Zingale
>>>>>> Associate Professor
>>>>>>
>>>>>> Dept. of Physics & Astronomy • Stony Brook University • Stony Brook,
>>>>>> NY 11794-3800
>>>>>> *phone*:  631-632-8225
>>>>>> *e-mail*: Michael.Zingale at stonybrook.edu
>>>>>> *web*: http://www.astro.sunysb.edu/mzingale
>>>>>> github: http://github.com/zingale
>>>>>>
>>>>>>
>>>>>> _______________________________________________
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>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Cameron Hummels
>>>>> NSF Postdoctoral Fellow
>>>>> Department of Astronomy
>>>>> California Institute of Technology
>>>>> http://chummels.org
>>>>>
>>>>> _______________________________________________
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>>>>>
>>>>>
>>>>
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