[yt-users] problem with slice after upgrade

[Slavin, Jonathan]

Hi all,

After upgrading yt to 3.3.3 I'm having trouble with slices.  Specifically
I'm doing:
ds = yt.load(file)
slc = ds.slice(2,0.)
dx = slc['dr'].min()

This is for FLASH data from a run in cylindrical (r,z) symmetry.  What I
get is:

ValueError                                Traceback (most recent call last)
/export/slavin/FLASH/mmsnr/plot_image.py in <module>()
    101     slc = ds.slice(2,0.)
    102     if first:
--> 103         dx = slc['dr'].min()
    104         xgl = ds.index.grids[0].LeftEdge[0]
    105         xgr = ds.index.grids[-1].RightEdge[0]

/export/slavin/python/anaconda/lib/python2.7/site-packages/yt/data_objects/data_containers.pyc
in __getitem__(self, key)
    270                 return self.field_data[f]
    271             else:
--> 272                 self.get_data(f)
    273         # fi.units is the unit expression string. We depend on the
registry
    274         # hanging off the dataset to define this unit object.

/export/slavin/python/anaconda/lib/python2.7/site-packages/yt/data_objects/data_containers.pyc
in get_data(self, fields)
   1119     def get_data(self, fields=None):
   1120         if self._current_chunk is None:
-> 1121             self.index._identify_base_chunk(self)
   1122         if fields is None: return
   1123         nfields = []

/export/slavin/python/anaconda/lib/python2.7/site-packages/yt/geometry/grid_geometry_handler.pyc
in _identify_base_chunk(self, dobj)
    302         #    fast_index = self._get_grid_tree()
    303         if getattr(dobj, "size", None) is None:
--> 304             dobj.size = self._count_selection(dobj, fast_index =
fast_index)
    305         if getattr(dobj, "shape", None) is None:
    306             dobj.shape = (dobj.size,)

/export/slavin/python/anaconda/lib/python2.7/site-packages/yt/geometry/grid_geometry_handler.pyc
in _count_selection(self, dobj, grids, fast_index)
    312             return fast_index.count(dobj.selector)
    313         if grids is None: grids = dobj._chunk_info
--> 314         count = sum((g.count(dobj.selector) for g in grids))
    315         return count
    316

/export/slavin/python/anaconda/lib/python2.7/site-packages/yt/geometry/grid_geometry_handler.pyc
in <genexpr>((g,))
    312             return fast_index.count(dobj.selector)
    313         if grids is None: grids = dobj._chunk_info
--> 314         count = sum((g.count(dobj.selector) for g in grids))
    315         return count
    316

/export/slavin/python/anaconda/lib/python2.7/site-packages/yt/data_objects/grid_patch.pyc
in count(self, selector)
    381
    382     def count(self, selector):
--> 383         mask = self._get_selector_mask(selector)
    384         if mask is None: return 0
    385         return self._last_count

/export/slavin/python/anaconda/lib/python2.7/site-packages/yt/data_objects/grid_patch.pyc
in _get_selector_mask(self, selector)
    363             mask = self._last_mask
    364         else:
--> 365             mask = selector.fill_mask(self)
    366             if self._cache_mask:
    367                 self._last_mask = mask

/export/slavin/python/anaconda/lib/python2.7/site-packages/yt/geometry/selection_routines.pyx
in yt.geometry.selection_routines.SliceSelector.fill_mask
(yt/geometry/selection_routines.c:21029)()
   1235                 if i == self.axis:
   1236                     ind[i][0] = \
-> 1237                         <int> ((self.coord -
(gobj.LeftEdge[i]).to_ndarray()) /
   1238                                gobj.dds[i])
   1239                     ind[i][1] = ind[i][0] + 1

ValueError: cannot convert float NaN to integer

​Anyone have any ideas on why this is happening?

Jon​

-- 
________________________________________________________
Jonathan D. Slavin                 Harvard-Smithsonian CfA
jslavin at cfa.harvard.edu       60 Garden Street, MS 83
phone: (617) 496-7981       Cambridge, MA 02138-1516
cell: (781) 363-0035             USA
________________________________________________________
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