[yt-dev] particle filter example

[Britton Smith]

I am getting this with just "DarkMatter" and "CenOstriker", which are not
exactly filters (or maybe they are), but the particle types as they are
stored on disk by Enzo-3.0.


On Mon, Dec 2, 2013 at 3:30 PM, Matthew Turk <matthewturk at gmail.com> wrote:

> On Mon, Dec 2, 2013 at 10:29 AM, Britton Smith <brittonsmith at gmail.com>
> wrote:
> > Hi Matt,
> >
> > Thanks, that's very helpful.
> >
> > I have an additional question.  When I do:
> > ad = pf.h.all_data()
> > ad['particle_mass'] or
> > ad['all', 'particle_mass']
> >
> > I get numbers that are ~1e44, which sounds about right if it's in grams.
> > However, when I do:
> > ad['DarkMatter', 'particle_mass']
> >
> > I get numbers that are ~1e-5, which I am guessing is the unconverted
> > particle_mass straight out of the file.  How can get the filtered
> particles
> > in proper units as well?
> >
>
> Hm, that looks like a bug to me.  What's your filter look like, so I
> can reproduce this here?
>
> > Thanks again,
> > Britton
> >
> >
> > On Mon, Dec 2, 2013 at 3:21 PM, Matthew Turk <matthewturk at gmail.com>
> wrote:
> >>
> >> Hey Britton,
> >>
> >> On Mon, Dec 2, 2013 at 10:15 AM, Britton Smith <brittonsmith at gmail.com>
> >> wrote:
> >> > Hi all,
> >> >
> >> > Can someone point me to an example (docs, notebooks, emails, whatever)
> >> > of
> >> > defining a custom particle filter for yt-3.0?  I'm trying to do this
> and
> >> > I
> >> > know I've seen discussion of this before, but I can't find where.
> >> >
> >>
> >> Yup.  Here's an example:
> >>
> >>
> >>
> http://nbviewer.ipython.org/url/hub.yt-project.org/notebooks/534fd19b933e4a3fa002db91f58fb817.ipynb
> >>
> >> Looks like the nbviewer is down though.
> >>
> >> Sorry I haven't done much documenting of this.  Particle filters and
> >> particle unions are two really cool things that are currently only in
> >> example form.  Here's another example of how to define one:
> >>
> >>
> >>
> https://bitbucket.org/mornkr/agora-analysis-script/src/1200830cd1e8d7dc60f66c8f1dc7c09764ca3276/script-Flagship-DM.py?at=default#cl-33
> >>
> >> and you have to add this by name to each pf you open up:
> >>
> >>
> >>
> https://bitbucket.org/mornkr/agora-analysis-script/src/1200830cd1e8d7dc60f66c8f1dc7c09764ca3276/script-Flagship-DM.py?at=default#cl-57
> >>
> >> Note that you have to specify *all* the required filtering fields in
> >> the constructor for the function.
> >>
> >> -Matt
> >>
> >> > Thanks,
> >> > Britton
> >> >
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