[yt-users] yt.utilities.amr_utils
Renyue Cen
cen at astro.princeton.edu
Sun Jan 13 12:22:11 PST 2013
Hi Matt,
It seems that my attempt to reuse "star_density" for a subset of stars does not work:
"star_density" remains the density of all stars when plotted.
But I also failed to redefine a new density that is called "SFRdensity" and feed it to AMRKDTree which is in turn
fed to camera to volume render. Here is what I did:
def _convertDensity(data):
return data.convert("Density")
def _SFRdensity(field, data):
blank = na.zeros(data.ActiveDimensions, dtype='float32')
if data.NumberOfParticles == 0: return blank
# filter = data.pf.time_units['years']*(data.pf.current_time - data['creation_time']) < 1.e8
filter = data.pf.time_units['years']*(data.pf.current_time - data['creation_time']) < 1.e6
if not filter.any(): return blank
amr_utils.CICDeposit_3(data["particle_position_x"][filter].astype(na.float64),
data["particle_position_y"][filter].astype(na.float64),
data["particle_position_z"][filter].astype(na.float64),
data["particle_mass"][filter].astype(na.float32),
na.int64(na.where(filter)[0].size),
blank, na.array(data.LeftEdge).astype(na.float64),
na.array(data.ActiveDimensions).astype(na.int32),
na.float64(data['dx']))
return blank
add_field("SFRdensity", function=_SFRdensity,
validators=[ValidateSpatial(0)], convert_function=_convertDensity)
volume3 = AMRKDTree(pf, fields=["SFRdensity"]
,no_ghost=False, tree_type="domain"
,le=c-0.5*WW, re=c+0.5*WW)
cam = pf.h.camera(c, L, W, (Nvec,Nvec), tf3, volume=volume3, no_ghost=False,log_fields=None
,north_vector=dir)
with the following error message:
Traceback (most recent call last):
File "SFR.py", line 393, in <module>
,le=c-0.5*WW, re=c+0.5*WW)
File "/u/jhwise/local/lib/python2.7/site-packages/yt-2.4-py2.7-linux-x86_64.egg/yt/utilities/amr_kdtree/amr_kdtree.py", line 316, in __init__
for field in self.fields]
File "/u/jhwise/local/lib/python2.7/site-packages/yt-2.4-py2.7-linux-x86_64.egg/yt/data_objects/field_info_container.py", line 71, in __missing__
return self.fallback[key]
File "/u/jhwise/local/lib/python2.7/site-packages/yt-2.4-py2.7-linux-x86_64.egg/yt/data_objects/field_info_container.py", line 71, in __missing__
return self.fallback[key]
File "/u/jhwise/local/lib/python2.7/site-packages/yt-2.4-py2.7-linux-x86_64.egg/yt/data_objects/field_info_container.py", line 70, in __missing__
raise KeyError("No field named %s" % key)
KeyError: 'No field named SFRdensity'
So I must be doing something wrong with defining the SFRdensity field.
Thanks very much,
Renyue
On Jan 13, 2013, at 1:20 PM, Matthew Turk wrote:
> Hi Renyue,
>
> The module amr_utils became lib a while back. But my guess is that
> you probably don't need to import it anyway, unless you are explicitly
> using one of the routines it provides.
>
> -Matt
>
> On Sun, Jan 13, 2013 at 12:18 PM, Renyue Cen <cen at astro.princeton.edu> wrote:
>> Hi,
>>
>> I am trying to compute gridded density of some subset of particles.
>> So I tried to import some modules first in the python script as follows:
>>
>> from yt.data_objects.field_info_container import \
>> FieldInfoContainer, \
>> NullFunc, \
>> TranslationFunc, \
>> FieldInfo, \
>> ValidateParameter, \
>> ValidateDataField, \
>> ValidateProperty, \
>> ValidateSpatial, \
>> ValidateGridType
>> import yt.data_objects.universal_fields
>> from yt.utilities.physical_constants import mh
>> from yt.funcs import *
>> import yt.utilities.amr_utils as amr_utils
>>
>>
>> But I got this error message:
>>
>> Traceback (most recent call last):
>> File "SFR.py", line 28, in <module>
>> import yt.utilities.amr_utils as amr_utils
>> ImportError: No module named amr_utils
>>
>>
>> Am I doing something wrong?
>>
>> Thanks,
>> Renyue
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