[yt-users] reading RAMSES files - missing cosmological_simulation flag?

[Matthew Turk]

Hi Rok,

Ah, my fault on that.  I've swapped back; please verify if you could.
The conversion factors for density and length and velocity are all
grabbed from the info*.txt file; does an additional conversion step
need to be applied?

-Matt

On Fri, Aug 5, 2011 at 11:30 AM, Rok Roskar <roskar at physik.uzh.ch> wrote:
> hi matt,
>
> thanks for the fix! works better now.
>
> Another issue - unless I'm somehow reading this wrong - is that the
> redshift is interpreted incorrectly (or rather, it appears that redshift
> and expansion factor have been swapped):
>
> yt : [INFO     ] 2011-08-05 17:17:14,961 Parameters: current_redshift
> = 0.499963102849
>
> but:
>
>>>> pn.parameters['aexp']
> 1.00014759949511
>
> this will probably mess up unit conversions, I would imagine.
>
> best,
>
> rok
>
> On Fri, 2011-08-05 at 09:49 -0400, Matthew Turk wrote:
>> Hi Rok,
>>
>> I've pushed a fix to the tip for this; however, even after running a
>> couple test problems in RAMSES, I was unable to determine how to
>> definitively identify cosmological simulations from non-cosmological
>> simulations.  I've therefore set this parameter to always be on.
>>
>> Please note that there are still issues with the RAMSES reader, and it
>> may behave unexpectedly.  Sam Geen, Oliver Hahn and I have been
>> working on them, but it has been a bit slow going the last little
>> while.  If you have any specific suggestions or ways we could improve,
>> we would definitely be interested in hearing them.
>>
>> Thanks very much,
>>
>> Matt
>>
>> On Fri, Aug 5, 2011 at 9:19 AM, Rok Roskar <roskar at physik.uzh.ch> wrote:
>> > hi there,
>> >
>> > trying to read a RAMSES output from a cosmological zoom simulation, I
>> > get the following perplexing error:
>> >
>> >>>> from yt.mods import *
>> >>>> sim = load("output_00422/info_00422.txt")
>> > output_00422/amr_00422.out00001
>> > yt : [INFO     ] 2011-08-05 15:13:45,236 Parameters: current_time
>> > = -2.10180018413e+16
>> > yt : [INFO     ] 2011-08-05 15:13:45,237 Parameters: domain_dimensions
>> > = [2 2 2]
>> > yt : [INFO     ] 2011-08-05 15:13:45,237 Parameters: domain_left_edge
>> > = [ 0.  0.  0.]
>> > yt : [INFO     ] 2011-08-05 15:13:45,238 Parameters: domain_right_edge
>> > = [ 1.  1.  1.]
>> > yt : [ERROR    ] 2011-08-05 15:13:45,238 Missing cosmological_simulation
>> > in parameter file definition!
>> >
>> >
>> > this clearly is a cosmological simulation with the relevant parameters
>> > specified in the info*.txt file - is something else needed?
>> >
>> > Thanks,
>> >
>> > Rok
>> >
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