[yt-users] Lightray object creation problem

[Pengfei Chen]

Hi Britton,

I've made those changes and now it works very well!

Thank you!

Pengfei


On Wed, Feb 12, 2014 at 4:26 AM, Britton Smith <brittonsmith at gmail.com>wrote:

> Hi Geoffrey and Pengfei,
>
> HistoryDumps seem to be poorly documented in the Enzo documentation, so I
> couldn't quite tell how they are used, but they appear to work very similar
> to the regular time data dumps.  If that is true, then I think you should
> be able to make things work by adding the following lines to your
> simulation parameter file:
> DataDumpName = HD
> DataDumpDir = HD
> If you try your light ray script again with those changes in the parameter
> file you use to make your light rays and add the "find_outputs=True"
> keyword, it should work.
>
> Britton
>
>
> On Tue, Feb 11, 2014 at 6:28 PM, Geoffrey So <gsiisg at gmail.com> wrote:
>
>> The simulations were made with
>> HistoryDumpDir      = HD
>> HistoryDumpName     = HD
>>
>> instead of the usual DD####/DD##### and with the #### replaced with the
>> cycle number
>> InitialCycleNumber  = 1200
>>
>> resulting in something like HD1200/HD1200 being the parameter file name.
>>
>> Is it a simple change to make YT read this kind of parameter file?
>>
>> From
>> G.S.
>>
>>
>>
>>
>>
>> On Tue, Feb 11, 2014 at 3:26 AM, Britton Smith <brittonsmith at gmail.com>wrote:
>>
>>> Hi Pengfei,
>>>
>>> How are the HD datadumps being made?  Are these outputs spaced evenly in
>>> time made with the dtDatadump parameter?  If not, the problem might be that
>>> the LightRay does not know how to detect them.  You might try adding the
>>> keyword, find_outputs=True, to your creation of the LightRay object.  That
>>> will search the simulation directory for all available datasets instead of
>>> trying to calculate them on its own.  This might not work if you have used
>>> parameters other than the following to name your outputs:
>>> DataDumpDir
>>> DataDumpName
>>> RedshiftDumpDir
>>> RedshiftDumpName
>>>
>>> Another thing you can do is use the functionality designed to tell you
>>> exactly what datasets you need to have in order to span the redshift
>>> interval you want.  Have a look at that here:
>>>
>>> http://yt-project.org/docs/dev/analyzing/analysis_modules/planning_cosmology_simulations.html
>>>
>>> If you don't have any luck with these suggestions, please post the
>>> parameter file you used to run this simulation and I can take a closer look.
>>>
>>> Britton
>>>
>>>
>>> On Fri, Feb 7, 2014 at 2:57 AM, Pengfei Chen <madcpf at gmail.com> wrote:
>>>
>>>> Hi all,
>>>>
>>>> I've got enough history dumps and some redshift dumps from Enzo but
>>>> when I tried to use them to create a lightray object, I got a problem:
>>>>
>>>> The code I use is:
>>>>
>>>> lr = LightRay("/scratch/01041/tg802953/BKGRD800B/HD4760/HD4760",
>>>>               'Enzo', 3.0, 5.0,
>>>>               use_minimum_datasets=True)
>>>>
>>>> And I have enough HDXXXX datasets. But I still get the following error:
>>>>
>>>> P000 yt : [ERROR    ] 2014-02-06 20:32:53,057 Cosmology splice
>>>> incomplete due to insufficient data outputs.
>>>>
>>>> I've done this with another simulation which has enough RDXXXX outputs
>>>> before and it worked well. So I wonder how could the LightRay recognize
>>>> HDXXXX datasets.
>>>>
>>>> Thanks,
>>>>
>>>> Pengfei
>>>>
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>>>
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