[yt-users] Trouble with SFR plots of enzo data

[Munier Azzam Salem]

Hi Greg,

    I'll take a look now. I altered the SFR routine to include any particle
whose type = 2 (regardless of creation time). And that sort of fixed the
jump after the restart (image attached). But the files' data still drift
apart, which seems like some sort of corruption in the particle info.

>From the graph it seems clear all particle creation times are set to zero
during the restart.


On Tue, Mar 5, 2013 at 4:46 PM, Greg Bryan <gbryan at astro.columbia.edu>wrote:

> Munier -- Yes, I think you're exactly right.  I would look at
> New_Grid_ReadGrid.C lines 459+ to see what it actually does with the
> ParticleAttributes during a restart (creation_time is one of the
> ParticleAttributes).
>
> Greg
>
> On Mar 5, 2013, at 3:49 PM, Munier Azzam Salem <msalem at astro.columbia.edu>
> wrote:
>
> Okay, this is very interesting:
>
> I printed dd["creation_time"] for the 10th data dump (last before
> restarting enzo) and the 11th and 12th (just after restarting). The former
> has all non-zero creation times. The other two have many, many zeroed out
> creation times. My theory is this IS enzo's fault, and that it's zeroing
> out the creation time when it loads in data for a restart run.
>
> My ham-fisted method of opening each file and summing all particle masses
> got around this because I wasn't checking creation time > 0.0. I can get
> away with this because I do not have live dark matter, but in general this
> should be fixed (in enzo).
>
>
> On Tue, Mar 5, 2013 at 3:41 PM, Stephen Skory <s at skory.us> wrote:
>
>> > But, I should emphasize that when I open each individual data file, sum
>> the
>> > particle masses, and plot, the total mass increases monotonically over
>> time,
>> > and agrees well with the decrease in gas mass. It's only when I analyze
>> via
>> > the star formation module that I see the jump.
>>
>> Ah, maybe I'm jumping the gun on blaming Enzo. You can do your own
>> simple tests for the star particle mass like this outside of the star
>> particle analysis module:
>>
>> dd = pf.h.all_data()
>> ct = dd['creation_time']
>> sel = (ct > 0)
>> pm = dd['ParticleMassMsun'][sel]
>> total_pm = pm.sum()
>>
>> Can you tell me if total_pm makes sense across your datasets?
>>
>>
>> --
>> Stephen Skory
>> s at skory.us
>> http://stephenskory.com/
>> 510.621.3687 (google voice)
>> _______________________________________________
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>>
>>
>
>
> --
> Munier A. Salem // 845.489.6450
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-- 
Munier A. Salem // 845.489.6450
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