[yt-users] Star Projections

[Matthew Turk]

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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