[yt-users] Trouble with FixedResolutionBuffer

[Nathan Goldbaum]

Hi Matt,

Thanks, that fixed it!

Best,
Nathan Goldbaum
Graduate Student
Astronomy & Astrophysics, UCSC
goldbaum at ucolick.org
http://www.ucolick.org/~goldbaum

On Sep 2, 2011, at 4:06 AM, Matthew Turk wrote:

> Hi Nathan,
> 
> On Fri, Sep 2, 2011 at 3:08 AM, Nathan Goldbaum <goldbaum at ucolick.org> wrote:
>> Hi all,
>> I'm trying to use FixedResolutionBuffer to generate 2d projections following
>> the example in the docs
>> (http://yt-project.org/doc/analyzing/generating_processed_data.html)
>> from yt.mods import *
>> pf = load("DD0000/test_disk_0000")
>> projden =
>> pf.h.proj(0,'Density',data_source=pf.h.all_data(),center=[0.5,0.5,0.5])
>> frb = FixedResolutionBuffer(projden,(0,0,1,1),(512,512))
>> print frb['Density']
>> ------> print(frb['Density'])
>> yt : [INFO     ] 2011-09-02 00:03:10,273 Making a fixed resolution buffer of
>> 512 by 512
>> [[ nan  nan  nan ...,  nan  nan  nan]
>>  [ nan  nan  nan ...,  nan  nan  nan]
>>  [ nan  nan  nan ...,  nan  nan  nan]
>>  ...,
>>  [ nan  nan  nan ...,  nan  nan  nan]
>>  [ nan  nan  nan ...,  nan  nan  nan]
>>  [ nan  nan  nan ...,  nan  nan  nan]]
>> Is there a problem with how I'm creating the buffer?
> 
> The bounds should be (pixelplane_x_min, pixelplane_x_max,
> pixelplane_y_min, pixelplane_y_max) -- you've ordered them with both
> mins, then both maxes.
> 
>> I'm pretty sure the
>> way this is done in the docs on the page I linked is incorrect, since I get
>> an error when I do when I try to say
>> sl = pf.h.proj(0,0.5)
> 
> Yup, thanks -- that should be "slice" which will be fixed in the next
> build of the docs, going up today.  Projections will implicitly use
> the whole domain, so you can call:  pf.h.proj(0, "Density") if you
> want a column density of the domain.
> 
> Best,
> 
> -Matt
> 
>> Thanks for your help,
>> Nathan
>> 
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>> 
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