[yt-users] Question in the projection plot

[Nathan Goldbaum]

Hi Junhwan,

It's the latter: z=center-0.2 to z=center+0.2.  If you don't like the center you've defined for the PlotCollection, you can optionally define a new center in the add_thin_projection call.

To see exactly what add_thin_projection is doing, take a look at its definition: https://bitbucket.org/yt_analysis/yt/src/f180d1f7c698/yt/visualization/plot_collection.py?at=yt#cl-791

Cheers,

Nathan

On Oct 10, 2012, at 8:01 AM, Jun-Hwan Choi wrote:

> It is nice there is a method what I need.
> One more question.
> Let say I set pc.add_thin_projection("Density","z",0.4).
> Is this thin projection is through z=0 to z=0.4 or z=center-0.2 to z=center+02 where the center is define at PlotCollection and/or add_thin_projection?
> 
> Thank you,
> Junhwan
> On 10/10/12 00:50, Matthew Turk wrote:
>> Hi Nathan and Jun-Hwan,
>> 
>>> Unfortunately, I just tried to create a plot that way and either I'm doing
>>> something wrong or there's a bug somewhere that breaks this functionality.
>>> I could create the projection object, but when I supplied the projection
>>> object as a data source in add_projection, it failed (traceback
>>> here:http://paste.yt-project.org/show/2775/). Can someone else on the list
>>> let us know if I'm doing something wrong here?
>> I think you want to create a region, with pf.h.region, and supply that
>> as the data source.  The data_source gets queried from the projection.
>>  You could also create field cuts by using an InlineExtractedRegion
>> but it's probably easier to do it with a region . So the next result
>> would be:
>> 
>> reg = pf.h.region([0.5, 0.5, 0.5], [0.3, 0.0, 0.0], [0.7, 0.0, 0.0])
>> pc.add_projection("Density", "x", data_source=reg)
>> 
>> But there's also pc.add_thin_projection which does this for you and
>> accepts a 'thickness' argument:
>> 
>> http://yt-project.org/doc/api/generated/yt.visualization.plot_collection.PlotCollection.add_thin_projection.html
>> 
>> So,
>> 
>> pc.add_thin_projection("Density", "z", 0.4)
>> 
>> Hope that helps!
>> 
>> -Matt
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> 
> 
> -- 
> --------------------------------------------------------------
> Jun-Hwan Choi, Ph.D.
> Department of Physics and Astronomy, University of Kentucky
> Tel: (859) 897-6737        Fax: (859) 323-2846
> Email: jhchoi at pa.uky.edu   URL: http://www.pa.uky.edu/~jhchoi
> --------------------------------------------------------------
> 
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