[yt-users] ZeroDivisionError accessing field from ray in spherical 1D FLASH data
Matthew Turk
matthewturk at gmail.com
Mon Jun 23 11:19:24 PDT 2014
Hi Luke,
Nah, not a bad influence. Try putting it at the cell center instead
of the cell edge. :) (0.0, 0.0) will be the very corner of the
domain, so it's skimming along the surface of a cell.
On Mon, Jun 23, 2014 at 1:16 PM, Luke Zoltan Kelley
<lkelley at cfa.harvard.edu> wrote:
> Thanks Matt, but now I'm having new problems with 'ortho_ray', following
> (http://yt-project.org/doc/visualizing/manual_plotting.html), I tried
>
>> ray = pf.h.ortho_ray(0, (0.0,0.0))
>
> which then gave me
>
> yt : [INFO ] 2014-06-23 14:15:52,664 Getting field x from 8
> ERROR: ValueError: cannot convert float NaN to integer
> [yt.data_objects.data_containers]
> astropy: [ERROR ] 2014-06-23 14:15:52,664 ValueError: cannot convert
> float NaN to integer
> ---------------------------------------------------------------------------
> ValueError Traceback (most recent call last)
> <ipython-input-157-318ebcfbdb94> in <module>()
> ----> 1 ray = pf.h.ortho_ray(0, (0.0,0.0))
>
> /Users/lzkelley/Applications/yt/yt-x86_64/src/yt-hg/yt/data_objects/data_containers.pyc
> in __init__(self, axis, coords, fields, pf, **kwargs)
> 578 self.px, self.py = coords
> 579 self.sort_by = axis_names[self.axis]
> --> 580 self._refresh_data()
> 581
> 582 @property
>
> /Users/lzkelley/Applications/yt/yt-x86_64/src/yt-hg/yt/data_objects/data_containers.pyc
> in _refresh_data(self)
> 304 """
> 305 self.clear_data()
> --> 306 self.get_data()
> 307
> 308 def keys(self):
>
>
> /Users/lzkelley/Applications/yt/yt-x86_64/src/yt-hg/yt/data_objects/data_containers.pyc
> in get_data(self, fields, in_grids)
> 523 self[field] = np.concatenate(
> 524 [self._get_data_from_grid(grid, field)
> --> 525 for grid in self._grids])
> 526 if not self.field_data.has_key(field):
> 527 continue
>
> /Users/lzkelley/Applications/yt/yt-x86_64/src/yt-hg/yt/data_objects/data_containers.pyc
> in save_state(self, grid, field, *args, **kwargs)
> 79 old_keys = grid.field_data.keys()
> 80 grid.field_parameters = self.field_parameters
> ---> 81 tr = func(self, grid, field, *args, **kwargs)
> 82 grid.field_parameters = old_params
> 83 grid.field_data = YTFieldData( [(k, grid.field_data[k]) for
> k in old_keys] )
>
> /Users/lzkelley/Applications/yt/yt-x86_64/src/yt-hg/yt/data_objects/data_containers.pyc
> in _get_data_from_grid(self, grid, field)
> 599 gdx = just_one(grid[self.px_dx])
> 600 gdy = just_one(grid[self.py_dx])
> --> 601 x_coord = int((self.px - grid.LeftEdge[self.px_ax])/gdx)
> 602 y_coord = int((self.py - grid.LeftEdge[self.py_ax])/gdy)
> 603 sl = [None,None,None]
>
> ValueError: cannot convert float NaN to integer
>
>
> Without doing anything wrong, perhaps I'm just a bad influence.
>
> Luke
>
>
>
>
> On Jun 23, 2014, at 2:05 PM, Matthew Turk <matthewturk at gmail.com> wrote:
>
> Hi Luke,
>
> You didn't do anything wrong. :) yt should be able to accept rays
> through "ray" that are orthogonal to the axes, but it can't because of
> some sloppiness. You have two options -- either use "ortho_ray"
> instead of "ray", which will make it orthogonal (and probably be a bit
> faster) or add jitter to the tune of 1e-12 to your 0.0 entries.
>
> -Matt
>
> On Mon, Jun 23, 2014 at 11:44 AM, Luke Zoltan Kelley
> <lkelley at cfa.harvard.edu> wrote:
>
> Hello yt-users,
>
> Just starting using YT, please forgive simple problems.
>
> I have 1D spherical FLASH data which I'm trying to plot. I thought I should
> use a 'ray', so I created one as such and try to access the data but I'm
> getting a ZeroDivision Error:
>
> from yt.mods import *
> pf = load('starwind_hdf5_plt_cnt_0000')
> In [141]: ray = pf.h.ray([0.0,0.0,0.0],[1.0e11,0.0,0.0], fields=["Density"])
> In [142]: ray['Density']
>
> yt : [INFO ] 2014-06-23 12:40:51,841 Getting field t from 138
> ERROR: ZeroDivisionError: float division [IPython.core.interactiveshell]
> astropy: [ERROR ] 2014-06-23 12:40:51,846 ZeroDivisionError: float
> division
> ---------------------------------------------------------------------------
> ZeroDivisionError Traceback (most recent call last)
> <ipython-input-142-c8a80a171d35> in <module>()
> ----> 1 ray['Density']
>
> /Users/lzkelley/Applications/yt/yt-x86_64/src/yt-hg/yt/data_objects/data_containers.pyc
> in __getitem__(self, key)
> 316 if key not in self.fields:
> 317 self.fields.append(key)
> --> 318 self.get_data(key)
> 319 return self.field_data[key]
> 320
>
> /Users/lzkelley/Applications/yt/yt-x86_64/src/yt-hg/yt/data_objects/data_containers.pyc
> in get_data(self, fields, in_grids)
> 523 self[field] = np.concatenate(
> 524 [self._get_data_from_grid(grid, field)
> --> 525 for grid in self._grids])
> 526 if not self.field_data.has_key(field):
> 527 continue
>
> /Users/lzkelley/Applications/yt/yt-x86_64/src/yt-hg/yt/data_objects/data_containers.pyc
> in save_state(self, grid, field, *args, **kwargs)
> 79 old_keys = grid.field_data.keys()
> 80 grid.field_parameters = self.field_parameters
> ---> 81 tr = func(self, grid, field, *args, **kwargs)
> 82 grid.field_parameters = old_params
> 83 grid.field_data = YTFieldData( [(k, grid.field_data[k]) for k
> in old_keys] )
>
> /Users/lzkelley/Applications/yt/yt-x86_64/src/yt-hg/yt/data_objects/data_containers.pyc
> in _get_data_from_grid(self, grid, field)
> 689 @restore_grid_state
> 690 def _get_data_from_grid(self, grid, field):
> --> 691 mask = np.logical_and(self._get_cut_mask(grid),
> 692 grid.child_mask)
> 693 if field == 'dts': return self._dts[grid.id][mask]
>
> /Users/lzkelley/Applications/yt/yt-x86_64/src/yt-hg/yt/data_objects/data_containers.pyc
> in check_cache(self, grid)
> 109 elif grid.id not in self._cut_masks or \
> 110 hasattr(self, "_boolean_touched"):
> --> 111 cm = func(self, grid)
> 112 self._cut_masks[grid.id] = cm
> 113 return self._cut_masks[grid.id]
>
> /Users/lzkelley/Applications/yt/yt-x86_64/src/yt-hg/yt/data_objects/data_containers.pyc
> in _get_cut_mask(self, grid)
> 704 ts = np.zeros(grid.ActiveDimensions, dtype='float64')
> 705 VoxelTraversal(mask, ts, dts, grid.LeftEdge, grid.RightEdge,
> --> 706 grid.dds, self.center, self.vec)
> 707 self._dts[grid.id] = np.abs(dts)
> 708 self._ts[grid.id] = np.abs(ts)
>
> /Users/lzkelley/Applications/yt/yt-x86_64/src/yt-hg/yt/utilities/lib/RayIntegrators.so
> in yt.utilities.lib.RayIntegrators.VoxelTraversal
> (yt/utilities/lib/RayIntegrators.c:3408)()
>
> ZeroDivisionError: float division
>
>
> yt instinfo
> Version = 2.6.1
> Changeset = c7bae05dd4ef
>
>
> Any ideas what I'm doing wrong?
> Thanks!
> Luke
>
> _______________________________________________
> yt-users mailing list
> yt-users at lists.spacepope.org
> http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org
>
> _______________________________________________
> yt-users mailing list
> yt-users at lists.spacepope.org
> http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org
>
>
>
> _______________________________________________
> yt-users mailing list
> yt-users at lists.spacepope.org
> http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org
>
More information about the yt-users
mailing list