Hi Reju,

ďhalos[0]Ē is the first halo in the list of halos found by ytís HaloFinder. 

Rather than looking directly at the source list, I recommend exploring the examples of how to use ytís cosmology analysis tools:

http://yt-project.org/docs/dev/cookbook/cosmological_analysis.html

and for the details of halo finding:

http://yt-project.org/docs/2.6/analyzing/analysis_modules/running_halofinder.html?highlight=virial_radius


Elizabeth


On May 27, 2014, at 4:01 PM, Reju Sam John <rejusamjohn@gmail.com> wrote:

Dear All,
How to find virial radius from enzo output. From the following page 

I came to know that there is a function called virial_radius(). But how to use it?
In the provided example 
>>> vr = halos[0].virial_radius()
what is ' halos[0] ' ?

Thank You
 

--
Reju Sam John
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