[yt-users] Unpickling phase plots

[David Collins]

> Yeah, these are the kind of subtleties we really want to avoid at this
> point.  The complexity makes it into a black box; this impedes the
> ability to dump things into crazy layouts and whatnot.

The subtleties I meant were the matplotlib subtleties, not the yt
subtleties.  I actually really appreciate that yt has  plot functions
that take care of most of those details for me, I've gotten quite far
with what yt provides.   Matplotlib, on the other hand, I find pretty
counter-intuitive (and in some cases overtly missleading in
documentation, variable names, and object structure)

I think that there's a balance between user- and expert- friendliness
in any complex tool, I in general appreciate where yt sits on that
balance.

Thanks,

d.

>
> At its heart, it's just a pcolormesh with masking for the zero values.
>  If you rely on standard matplotlib/pylab to get there, I think you
> should be okay -- but yes, the complexity and subtleties that have
> developed there need to be eliminated.  For the most part they have
> changed only slightly since Matplotlib 0.91, which was a long time
> ago.  The motion to a stripped down object is to require more thought
> on the part of the user, but in doing so to allow greater flexibility
> in what can be done.
>
> Good luck ...
>
> -Matt
>
> On Fri, Jul 1, 2011 at 10:48 AM, David Collins
> <dcollins at physics.ucsd.edu> wrote:
>>> Yes, but you should also be able to pickle just the ._data attribute
>>> (which is a dict of numpy arrays) of the BinnedProfile2D object, too.
>>
>> I might revert to that.  I had tried that initially, but using the
>> BinnedProfile object lets me call PlotTypes.PhasePlot directly, and
>> there are a number of subtleties about the plotting done in that
>> routine that I like, so I could avoid some wheel reinvention.
>>
>> Thanks a ton,
>> d.
>>
>>>
>>> On Fri, Jul 1, 2011 at 9:30 AM, David Collins <dcollins at physics.ucsd.edu> wrote:
>>>>> designed to allow it, and I have been using successfully lately.  Use
>>>>> yt.visualization.profile_plotter.PhasePlotter, which is substantially
>>>>
>>>> Cool, I'll give that a shot.
>>>>
>>>> Is it possible to cram an existing pickle (if I'm on the originating
>>>> machine, where the unpickle works)  into the PhasePlotter format, or
>>>> will I need to remake the phase plots?
>>>>
>>>> Thanks!
>>>> d.
>>>>
>>>>
>>>>> more constraining in exposed methods, but also provides the attribute
>>>>> .plot, which can be pickled and which itself provides a to_mpl
>>>>> function that takes filenames, axes or figures.  You should read the
>>>>> source to see how it works, but this is the "future" for pickling and
>>>>> passing plots.
>>>>>
>>>>> -Matt
>>>>>
>>>>>>
>>>>>> This is a technique I've used in the past, so in principle it's sound.
>>>>>>
>>>>>> Thanks,
>>>>>> d.
>>>>>>
>>>>>> Full trace:
>>>>>> Traceback (most recent call last):
>>>>>>  File "<stdin>", line 1, in <module>
>>>>>>  File "p8_theta_coarse.py", line 6, in <module>
>>>>>>    phase = fPickle.load(infile)
>>>>>>  File "/Users/dcollins/Sites/Research/CodeGames/yt2.0/fPickle.py",
>>>>>> line 9, in load
>>>>>>    output = cPickle.load(inputfile,*args,**kwargs)
>>>>>>  File "/Users/dcollins/local/lib/python2.6/site-packages/yt-2.1dev-py2.6-macosx-10.4-i386.egg/yt/data_objects/static_output.py",
>>>>>> line 192, in _reconstruct_pf
>>>>>>    pf = pfs.get_pf_hash(*args)
>>>>>>  File "/Users/dcollins/local/lib/python2.6/site-packages/yt-2.1dev-py2.6-macosx-10.4-i386.egg/yt/utilities/parameter_file_storage.py",
>>>>>> line 104, in get_pf_hash
>>>>>>    return self._convert_pf(self._records[hash])
>>>>>> KeyError: (('32aa7d1d4941760ffd8fdcab4ea97e1f',), <function
>>>>>> _reconstruct_pf at 0x101f9d050>,
>>>>>> ('32aa7d1d4941760ffd8fdcab4ea97e1f',))
>>>>>>
>>>>>>
>>>>>> --
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