[yt-users] halo density profiling

[Irina Dvorkin]

Hi Britton,

Thanks a lot, now the profiler works!

Irina

Quoting "Britton Smith" <brittonsmith at gmail.com>:

> Hi Irina,
>
> It would be more correct to use weight_field='CellMassMsun' with a density
> profile since what the profile is actually doing is adding up the field
> values for all the cells inside a spherical shell.  Adding the weight field
> tells the profiler to calculate the weighted mean value instead of simply
> taking the sum.  Anything like density or temperature for which a simple sum
> is meaningless should have a weight field.
>
> The weight_field=None in the manual is a typo.  I will change it and the
> next time the docs are rebuilt this will be reflected.  You can also view
> the docs locally by unzipping the file docs_html.zip in the doc directory of
> the yt install.
>
> The halo profiler can essentially do two things: profiling and projections.
> You can profile or project any field that yt makes available to you.  The
> halo profiler also has functionality for filtering halos based on the
> profiles.  All of this is discussed in detail in the halo profiler
> documentation: http://yt.enzotools.org/doc/extensions/halo_profiling.html
>
> Britton
>
> On Sun, Jul 25, 2010 at 8:30 AM, Irina Dvorkin <irina at wise.tau.ac.il> wrote:
>
>> Hello All,
>>
>> I'm trying to use the halo profiler, without much success.
>> If I want to plot the density, do I need to use the weight_field?
>> It says weight_field=None in the manual, but weight_field='CellMassMsun' in
>> the cookbook.
>> Is it the same for Dark_Matter_Density?
>>
>> Also, where can I see a list of things the halo profiler can in principle
>> do? I coudn't find it on the site.
>>
>> Thanks a lot for your help,
>> Irina
>>
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>