[yt-users] plot with source region and field parameters

[Matthew Turk]

Hey Dave,

If you do the projection of the region, it correctly gets the region right?

If so, file a bug, assign it to me, and I will correct it when I can
get back to the computer.  I think I know what's going on -- I suspect
during the _get_data_from_grid call (or whatever it is in the
quadtree) it's not passing field parameters through.  As a backup for
the moment you might be able to use overlap_proj, but this is 100% a
bug and needs to be fixed, so file a bug assigned to me and I'll get
at it asap.

-Matt

On Thu, May 9, 2013 at 6:20 PM, david collins <dcollins4096 at gmail.com> wrote:
> Hi, Everybody--
>
> I have a field that I have defined that uses a field_parameter, but I don't
> seem to be able to get it to work with a projection.
>
>>>> region
> AMRRegion (time0050): center=[ 0.5         0.03369141  0.68457031],
> left_edge=[ 0.          0.00195312  0.63378906], right_edge=[ 1.
> 0.06542969  0.73535156]
>
> def linewidth(field,data):
>     avg_vx = data.get_field_parameter('avg_vx')
>     return (data['x-velocity']-avg_vx)**2
> add_field('linewidth',function=linewidth,
> validators=[ValidateParameter('avg_vx')])
> avg_vx = 7
> region.set_field_parameter('avg_vx',avg_vx)
> print region['linewidth'].min()
> print region.get_field_parameter('avg_vx')
>
> which yields expected output,
> 1.15751883639e-07
> 7
>
> But trying to make a projection of that source gives the error below.  Is it
> obvious what I'm doing wrong? I can plot 'Density' just fine.
>
> Thanks!
>
>>>> proj = oober.pf.h.proj(2,'linewidth',source=region)
> Initializing tree  0 /  4100%
> ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
> Time: 00:00:00
> Traceback (most recent call last):
> | ETA:  --:--:--
>   File "<stdin>", line 1, in <module>
>   File
> "/nics/b/home/collins/local_2013_03_12/src/yt-hg/yt/data_objects/data_containers.py",
> line 1758, in __init__
>     self._refresh_data()
>   File
> "/nics/b/home/collins/local_2013_03_12/src/yt-hg/yt/data_objects/data_containers.py",
> line 318, in _refresh_data
>     self.get_data()
>   File
> "/nics/b/home/collins/local_2013_03_12/src/yt-hg/yt/data_objects/data_containers.py",
> line 1859, in get_data
>     self._add_level_to_tree(tree, level, fields)
>   File
> "/nics/b/home/collins/local_2013_03_12/src/yt-hg/yt/data_objects/data_containers.py",
> line 1981, in _add_level_to_tree
>     self._add_grid_to_tree(tree, grid, fields, zero_out, dls)
>   File
> "/nics/b/home/collins/local_2013_03_12/src/yt-hg/yt/data_objects/data_containers.py",
> line 1925, in _add_grid_to_tree
>     for fd in self._get_data_from_grid(grid, fields)]
>   File
> "/nics/b/home/collins/local_2013_03_12/src/yt-hg/yt/data_objects/data_containers.py",
> line 93, in save_state
>     tr = func(self, grid, field, *args, **kwargs)
>   File
> "/nics/b/home/collins/local_2013_03_12/src/yt-hg/yt/data_objects/data_containers.py",
> line 2003, in _get_data_from_grid
>     return [grid[field] * bad_points for field in fields]
>   File
> "/nics/b/home/collins/local_2013_03_12/src/yt-hg/yt/data_objects/grid_patch.py",
> line 157, in __getitem__
>     self.get_data(key)
>   File
> "/nics/b/home/collins/local_2013_03_12/src/yt-hg/yt/data_objects/grid_patch.py",
> line 200, in get_data
>     self._generate_field(field)
>   File
> "/nics/b/home/collins/local_2013_03_12/src/yt-hg/yt/data_objects/grid_patch.py",
> line 132, in _generate_field
>     self.pf.field_info[field].check_available(self)
>   File
> "/nics/b/home/collins/local_2013_03_12/src/yt-hg/yt/data_objects/field_info_container.py",
> line 364, in check_available
>     validator(data)
>   File
> "/nics/b/home/collins/local_2013_03_12/src/yt-hg/yt/data_objects/field_info_container.py",
> line 440, in __call__
>     raise NeedsParameter(doesnt_have)
> yt.data_objects.field_info_container.NeedsParameter: (['avg_vx'])
>
>
>
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