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ZeroDivisionError accessing field from ray in spherical 1D FLASH data

Luke Zoltan Kelley

23 Jun 2014 23 Jun '14

6:44 p.m.

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

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Matthew Turk

23 Jun 23 Jun

8:05 p.m.

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 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

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Luke Zoltan Kelley

8:16 p.m.

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 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 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

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yt-users mailing list yt-users@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org

Matthew Turk

8:19 p.m.

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 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 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 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@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org

_______________________________________________ yt-users mailing list yt-users@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org

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Luke Zoltan Kelley

8:27 p.m.

Thanks for working with me on this Matt, but I got a new one for you: In [164]: print pf.domain_width [ 4.00000000e+11 3.14159265e+00 1.74532925e-02] In [165]: ray = pf.h.ortho_ray(0, (3.14*0.5, 1.75e-2*0.5)) yt : [INFO ] 2014-06-23 14:22:26,386 Getting field x from 0 ERROR: ValueError: need at least one array to concatenate [yt.data_objects.data_containers] astropy: [ERROR ] 2014-06-23 14:22:26,386 ValueError: need at least one array to concatenate --------------------------------------------------------------------------- ValueError Traceback (most recent call last) <ipython-input-165-9633905f901e> in <module>() ----> 1 ray = pf.h.ortho_ray(0, (3.14*0.5, 1.75e-2*0.5)) /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 ValueError: need at least one array to concatenate could this be something about the data being 1D? Actually, I have no idea if this means anything, but when I ask for the dimensionality: In [172]: pf.dimensionality Out[172]: 2 In [171]: pf.domain_dimensions Out[171]: array([ 8, 16, 1]) But my FLASH log confirms the dimensionality is 1... On Jun 23, 2014, at 2:19 PM, Matthew Turk wrote:

...

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 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 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 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

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Matthew Turk

8:35 p.m.

Hi Luke, Not sure if the dimensionality is a problem or not. But it's saying it doesn't find any grids intersecting with the ray, which is confusing. What's the output of "pf.domain_left_edge" and "pf.domain_right_edge"? On Mon, Jun 23, 2014 at 1:27 PM, Luke Zoltan Kelley wrote:

...

Thanks for working with me on this Matt, but I got a new one for you:

In [164]: print pf.domain_width [ 4.00000000e+11 3.14159265e+00 1.74532925e-02]

In [165]: ray = pf.h.ortho_ray(0, (3.14*0.5, 1.75e-2*0.5)) yt : [INFO ] 2014-06-23 14:22:26,386 Getting field x from 0 ERROR: ValueError: need at least one array to concatenate [yt.data_objects.data_containers] astropy: [ERROR ] 2014-06-23 14:22:26,386 ValueError: need at least one array to concatenate --------------------------------------------------------------------------- ValueError Traceback (most recent call last) <ipython-input-165-9633905f901e> in <module>() ----> 1 ray = pf.h.ortho_ray(0, (3.14*0.5, 1.75e-2*0.5))

/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

ValueError: need at least one array to concatenate

could this be something about the data being 1D?

Actually, I have no idea if this means anything, but when I ask for the dimensionality:

In [172]: pf.dimensionality Out[172]: 2

In [171]: pf.domain_dimensions Out[171]: array([ 8, 16, 1])

But my FLASH log confirms the dimensionality is 1...

On Jun 23, 2014, at 2:19 PM, Matthew Turk wrote:

...
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 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 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 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@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org

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Luke Zoltan Kelley

8:38 p.m.

In [173]: pf.domain_left_edge Out[173]: array([ 0., 0., 0.]) In [174]: pf.domain_right_edge Out[174]: array([ 4.00000000e+11, 3.14159265e+00, 1.74532925e-02]) On Jun 23, 2014, at 2:35 PM, Matthew Turk wrote:

...

Hi Luke,

Not sure if the dimensionality is a problem or not. But it's saying it doesn't find any grids intersecting with the ray, which is confusing. What's the output of "pf.domain_left_edge" and "pf.domain_right_edge"?

On Mon, Jun 23, 2014 at 1:27 PM, Luke Zoltan Kelley wrote:

...
Thanks for working with me on this Matt, but I got a new one for you:

In [164]: print pf.domain_width [ 4.00000000e+11 3.14159265e+00 1.74532925e-02]

In [165]: ray = pf.h.ortho_ray(0, (3.14*0.5, 1.75e-2*0.5)) yt : [INFO ] 2014-06-23 14:22:26,386 Getting field x from 0 ERROR: ValueError: need at least one array to concatenate [yt.data_objects.data_containers] astropy: [ERROR ] 2014-06-23 14:22:26,386 ValueError: need at least one array to concatenate --------------------------------------------------------------------------- ValueError Traceback (most recent call last) <ipython-input-165-9633905f901e> in <module>() ----> 1 ray = pf.h.ortho_ray(0, (3.14*0.5, 1.75e-2*0.5))

/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

ValueError: need at least one array to concatenate

could this be something about the data being 1D?

Actually, I have no idea if this means anything, but when I ask for the dimensionality:

In [172]: pf.dimensionality Out[172]: 2

In [171]: pf.domain_dimensions Out[171]: array([ 8, 16, 1])

But my FLASH log confirms the dimensionality is 1...

On Jun 23, 2014, at 2:19 PM, Matthew Turk wrote:

...
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 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 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 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

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Matthew Turk

9:14 p.m.

Well, that's weird! It might be related to it being in 1D. Can you try doing a similar operation with a yt-3.0 "bleeding edge" install? 3.0 will have much better support for spherical data. On Mon, Jun 23, 2014 at 1:38 PM, Luke Zoltan Kelley wrote:

...

In [173]: pf.domain_left_edge Out[173]: array([ 0., 0., 0.])

In [174]: pf.domain_right_edge Out[174]: array([ 4.00000000e+11, 3.14159265e+00, 1.74532925e-02])

On Jun 23, 2014, at 2:35 PM, Matthew Turk wrote:

...
Hi Luke,

Not sure if the dimensionality is a problem or not. But it's saying it doesn't find any grids intersecting with the ray, which is confusing. What's the output of "pf.domain_left_edge" and "pf.domain_right_edge"?

On Mon, Jun 23, 2014 at 1:27 PM, Luke Zoltan Kelley wrote:

...
Thanks for working with me on this Matt, but I got a new one for you:

In [164]: print pf.domain_width [ 4.00000000e+11 3.14159265e+00 1.74532925e-02]

In [165]: ray = pf.h.ortho_ray(0, (3.14*0.5, 1.75e-2*0.5)) yt : [INFO ] 2014-06-23 14:22:26,386 Getting field x from 0 ERROR: ValueError: need at least one array to concatenate [yt.data_objects.data_containers] astropy: [ERROR ] 2014-06-23 14:22:26,386 ValueError: need at least one array to concatenate --------------------------------------------------------------------------- ValueError Traceback (most recent call last) <ipython-input-165-9633905f901e> in <module>() ----> 1 ray = pf.h.ortho_ray(0, (3.14*0.5, 1.75e-2*0.5))

/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

ValueError: need at least one array to concatenate

could this be something about the data being 1D?

Actually, I have no idea if this means anything, but when I ask for the dimensionality:

In [172]: pf.dimensionality Out[172]: 2

In [171]: pf.domain_dimensions Out[171]: array([ 8, 16, 1])

But my FLASH log confirms the dimensionality is 1...

On Jun 23, 2014, at 2:19 PM, Matthew Turk wrote:

...
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 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 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 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

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Luke Zoltan Kelley

9:59 p.m.

That worked! Thanks! On Jun 23, 2014, at 3:14 PM, Matthew Turk wrote:

...

Well, that's weird! It might be related to it being in 1D. Can you try doing a similar operation with a yt-3.0 "bleeding edge" install? 3.0 will have much better support for spherical data.

On Mon, Jun 23, 2014 at 1:38 PM, Luke Zoltan Kelley wrote:

...
In [173]: pf.domain_left_edge Out[173]: array([ 0., 0., 0.])

In [174]: pf.domain_right_edge Out[174]: array([ 4.00000000e+11, 3.14159265e+00, 1.74532925e-02])

On Jun 23, 2014, at 2:35 PM, Matthew Turk wrote:

...
Hi Luke,

Not sure if the dimensionality is a problem or not. But it's saying it doesn't find any grids intersecting with the ray, which is confusing. What's the output of "pf.domain_left_edge" and "pf.domain_right_edge"?

On Mon, Jun 23, 2014 at 1:27 PM, Luke Zoltan Kelley wrote:

...
Thanks for working with me on this Matt, but I got a new one for you:

In [164]: print pf.domain_width [ 4.00000000e+11 3.14159265e+00 1.74532925e-02]

In [165]: ray = pf.h.ortho_ray(0, (3.14*0.5, 1.75e-2*0.5)) yt : [INFO ] 2014-06-23 14:22:26,386 Getting field x from 0 ERROR: ValueError: need at least one array to concatenate [yt.data_objects.data_containers] astropy: [ERROR ] 2014-06-23 14:22:26,386 ValueError: need at least one array to concatenate --------------------------------------------------------------------------- ValueError Traceback (most recent call last) <ipython-input-165-9633905f901e> in <module>() ----> 1 ray = pf.h.ortho_ray(0, (3.14*0.5, 1.75e-2*0.5))

/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

ValueError: need at least one array to concatenate

could this be something about the data being 1D?

Actually, I have no idea if this means anything, but when I ask for the dimensionality:

In [172]: pf.dimensionality Out[172]: 2

In [171]: pf.domain_dimensions Out[171]: array([ 8, 16, 1])

But my FLASH log confirms the dimensionality is 1...

On Jun 23, 2014, at 2:19 PM, Matthew Turk wrote:

...
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 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 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 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

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ZeroDivisionError accessing field from ray in spherical 1D FLASH data

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