[yt-users] Star Projections

Munier Azzam Salem msalem at astro.columbia.edu
Wed Nov 28 13:18:24 PST 2012


Hi Matt,

      The command (on ranger, btw) gives

*yt module located at:*
*    /share/home/01686/msalem/yt-x86_64/src/yt-hg*
*
*
*The current version of the code is:*
*
*
*---*
*6f3c1cf6960d (stable)*
*---*
*
*
*This installation CAN be automatically updated.*
*Updated successfully.*



On Wed, Nov 28, 2012 at 3:30 PM, Matthew Turk <matthewturk at gmail.com> wrote:

> Hi Munier,
>
> That's weird, it should be in there.  What's the output of "yt
> instinfo", particularly the hash?
>
> -Matt
>
> On Wed, Nov 28, 2012 at 3:29 PM, Munier Azzam Salem
> <msalem at astro.columbia.edu> wrote:
> > Hi Nathan,
> >
> >       Thanks for the tips. I think the fixed-resolution buffer is exactly
> > what I need here. Unfortunately, when I run the command:
> >
> > frb = proj.to_frb(width, res, center=c)
> >
> >
> >      I get the error
> >
> > Traceback (most recent call last):
> >   File "smllPlt.py", line 16, in <module>
> >     frb = proj.to_frb(width,res)
> > AttributeError: 'AMRQuadTreeProj' object has no attribute 'to_frb'
> >
> >       I tried updating my version of yt and deleting any .yt files, but
> the
> > error stuck.
> >
> >            best,
> >              Munier
> >
> >
> >
> > On Wed, Nov 28, 2012 at 2:34 PM, Nathan Goldbaum <nathan12343 at gmail.com>
> > wrote:
> >>
> >> Hi Munier,
> >>
> >> I suspect that the projection of the particle field is zero in the
> >> locations that are colored white in your image.  This causes these
> regions
> >> to 'fall off' the bottom end of the logarithmic color bar.
> >>
> >> I think you have two options.  One would be to use a linear colorbar.
>  You
> >> can do this following the instructions here:
> >>
> http://yt-project.org/doc/faq/index.html#how-do-i-modify-whether-or-not-yt-takes-the-log-of-a-particular-field
> >>
> >> Another option would be to make the plot by hand using a
> >> FixedResolutionBuffer.  In this case you would make the projection
> object by
> >> hand, extract the raw image buffer using an FRB, and then make the plot
> >> manually using matplotlib.  There's an example in the yt docs that
> covers
> >> how to do this:
> >>
> http://yt-project.org/doc/visualizing/manual_plotting.html?highlight=manual%20plotting
> >>
> >> In the latter case if you want the areas that project to zero to appear
> >> with a logarithmic colorbar, you'll need to manually set the regions in
> the
> >> FRB that are equal to zero to some small number.
> >>
> >> Cheers,
> >>
> >> Nathan
> >>
> >> On Nov 28, 2012, at 9:29 AM, Munier Azzam Salem wrote:
> >>
> >> Hi yt gurus,
> >>
> >>       I've been making projections of star_density from enzo output
> files
> >> and they seem to be working out fine. However, wherever particles do not
> >> exist the background remains white instead of following my chosen
> colormap.
> >> Is there a way to paint these areas to follow the colormap?
> >>
> >>        thanks!
> >>            Munier
> >>
> >> I've attached an image of what gets plotted, and the relevant bits of my
> >> script are:
> >>
> >> from yt.mods import *
> >>
> >> fName = "DD0006/test_sim_0006"
> >> var   = "star_density"
> >> axis  = 0
> >>
> >> pf = load(fName)
> >> pf.h
> >>
> >> pc = PlotCollection(pf)
> >> p = pc.add_projection(var,axis)
> >> #p.modify["particles"](1.0)
> >>
> >> radius = .02;
> >>
> >> pc.set_xlim(.5-radius,.5+radius)
> >> pc.set_ylim(.5-radius,.5+radius)
> >>
> >> pc.save(fName)
> >>
> >>
> >> --
> >> Munier A. Salem // 845.489.6450
> >>
> >>
> <test_sim_0006_Projection_x_star_density.png>_______________________________________________
> >> yt-users mailing list
> >> yt-users at lists.spacepope.org
> >> http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org
> >>
> >>
> >>
> >> _______________________________________________
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> >>
> >
> >
> >
> > --
> > Munier A. Salem // 845.489.6450
> >
> > _______________________________________________
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> >
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-- 
Munier A. Salem // 845.489.6450
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