[yt-users] Star Projections

[Matthew Turk]

Hi Munier,

Ah, my mistake -- to_frb was added in the development branch since our
last release, which was in September.  You can either update to the
development branch (hg up -C yt ; python2.7 setup.py develop ) or used
a FixedResolutioBuffer manually (super easy to do).

-Matt

On Wed, Nov 28, 2012 at 4:18 PM, Munier Azzam Salem
<msalem at astro.columbia.edu> wrote:
> 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>_______________________________________________
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>> >>
>> >>
>> >>
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>> >
>> >
>> >
>> > --
>> > Munier A. Salem // 845.489.6450
>> >
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>
>
>
> --
> Munier A. Salem // 845.489.6450
>
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