[yt-users] log scale image for zero dynamic range

[Chang-Goo Kim]

Good! This works.

Thanks a lot!!

Chang-Goo


On Sun, May 18, 2014 at 2:00 PM, Nathan Goldbaum <nathan12343 at gmail.com>wrote:

>
>
>
> On Sun, May 18, 2014 at 10:44 AM, Chang-Goo Kim <cgkim at astro.princeton.edu
> > wrote:
>
>> Hi Nathan,
>>
>>
>>
>>
>> On Sun, May 18, 2014 at 2:17 AM, Nathan Goldbaum <nathan12343 at gmail.com>wrote:
>>
>>> Although it occurs to me that you might be able to work around this
>>> behavior by doing something like:
>>>
>>> slc = SlicePlot(ds, 'x', 'density')
>>> slc.set_zlim('density', 1e-4, 1e-0)
>>> slc.set_log('density', True)
>>>
>>> The key here is to call set_log after set_zlim.
>>>
>>
>>
>> As seen in the source code, this is exactly what I did. But, it didn't
>> work.
>>
>
> That's what I get for replying to technical e-mail on my phone on a
> plane...
>
> In any case, I've issued a PR that *should* fix this issue:
>
>
> https://bitbucket.org/yt_analysis/yt/pull-request/909/making-it-possible-to-specify-colorbar/diff
>
> I'd appreciate it if you tried it on your workflow.  If you'd like, leave
> a comment on the PR indicating whether or not it worked for you.
>
>
>>
>> Chang-Goo
>>
>>
>>>
>>> Just for some context: it is set up that way to avoid a crash in
>>> matplotlib which does not like creating logarithmic colorbars for data
>>> with zero dynamic range.
>>>
>>> Hope that's helpful,
>>>
>>> Nathan
>>>
>>> On Saturday, May 17, 2014, Nathan Goldbaum <nathan12343 at gmail.com>
>>> wrote:
>>>
>>>> Ah, thanks for the report - I replied hastily before getting on a
>>>> plane without looking at the source.
>>>>
>>>> I'll look at this tomorrow.
>>>>
>>>> Nathan
>>>>
>>>> On Saturday, May 17, 2014, Chang-Goo Kim <cgkim at astro.princeton.edu>
>>>> wrote:
>>>>
>>>>> Hi Nathan,
>>>>>
>>>>> I did set the limits explicitly, but yt switches colorer before it
>>>>> saves. See below for the link for my source code and the last part of error
>>>>> message.
>>>>>
>>>>> Chang-Goo
>>>>>
>>>>>
>>>>> http://paste.yt-project.org/show/4645/
>>>>>
>>>>>
>>>>> yt : [INFO     ] 2014-05-17 23:29:15,766 Making a fixed resolution
>>>>> buffer of (('gas', 'pok')) 512 by 512
>>>>>
>>>>> yt : [INFO     ] 2014-05-17 23:29:15,780 Making a fixed resolution
>>>>> buffer of (('athena', 'density')) 512 by 512
>>>>>
>>>>> yt : [INFO     ] 2014-05-17 23:29:15,795 Making a fixed resolution
>>>>> buffer of (('gas', 'nH')) 512 by 512
>>>>>
>>>>> yt : [INFO     ] 2014-05-17 23:29:15,810 Making a fixed resolution
>>>>> buffer of (('gas', 'density')) 512 by 512
>>>>>
>>>>> yt : [INFO     ] 2014-05-17 23:29:15,825 Making a fixed resolution
>>>>> buffer of (('gas', 'temp')) 512 by 512
>>>>>
>>>>> yt : [INFO     ] 2014-05-17 23:29:15,839 Making a fixed resolution
>>>>> buffer of (('athena', 'pressure')) 512 by 512
>>>>>
>>>>> yt : [INFO     ] 2014-05-17 23:29:15,854 Making a fixed resolution
>>>>> buffer of (('gas', 'pressure')) 512 by 512
>>>>>
>>>>> yt : [WARNING  ] 2014-05-17 23:29:15,889 Plot image for field ('gas',
>>>>> 'nH') has zero dynamic range. Min = Max = 3.
>>>>>
>>>>> yt : [WARNING  ] 2014-05-17 23:29:15,889 Switching to linear colorbar
>>>>> scaling.
>>>>>
>>>>> yt : [WARNING  ] 2014-05-17 23:29:16,364 Plot image for field ('gas',
>>>>> 'nH') has zero dynamic range. Min = Max = 3.
>>>>>
>>>>> yt : [WARNING  ] 2014-05-17 23:29:16,364 Switching to linear colorbar
>>>>> scaling.
>>>>>
>>>>> yt : [INFO     ] 2014-05-17 23:29:17,385 Saving plot
>>>>> /scratch/gpfs/changgoo/sntest_TI/png/n2_SN_dx2_L256_TE_multi_fm3/n2_SN_dx2_L256_TE_multi_fm3.0000_Slice_z_temp.png
>>>>>
>>>>> yt : [INFO     ] 2014-05-17 23:29:17,916 Saving plot
>>>>> /scratch/gpfs/changgoo/sntest_TI/png/n2_SN_dx2_L256_TE_multi_fm3/n2_SN_dx2_L256_TE_multi_fm3.0000_Slice_z_nH.png
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> On Sat, May 17, 2014 at 7:50 PM, Nathan Goldbaum <
>>>>> nathan12343 at gmail.com> wrote:
>>>>>
>>>>>> Hi Chang-Goo
>>>>>>
>>>>>> If you explicitly set the limits of the colorbar using the set_zlim
>>>>>> function you will avoid the zero dynamic range check.  That will also keep
>>>>>> the colorbar limits the same from frame to frame.
>>>>>>
>>>>>> Nathan
>>>>>>
>>>>>>
>>>>>> On Saturday, May 17, 2014, Chang-Goo Kim <cgkim at astro.princeton.edu>
>>>>>> wrote:
>>>>>>
>>>>>>> Hi all,
>>>>>>>
>>>>>>> When initial condition is uniform, it has zero dynamic range.
>>>>>>> Although it has no dynamic range, sometimes I need to plot it with log
>>>>>>> scale colorbar to make a movie with the same colorbar for later times. But,
>>>>>>> yt forced switch to linear colorbar. How can I make yt not to do that.
>>>>>>>
>>>>>>> Thanks,
>>>>>>>
>>>>>>> Chang-Goo
>>>>>>>
>>>>>>
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>>>>>>
>>>>>
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