Hi Elizabeth,
Yes, and it feels like this exact issue -- where dims are lists, not
On Fri, Apr 25, 2014 at 3:40 AM, Elizabeth Tasker
<tasker@astro1.sci.hokudai.ac.jp> wrote:
> Hi,
>
> I've hit a problem with the latest version of yt and covering grid that is
> linked with the number of ghostzones. My code looked like:
>
> for dim in range(3):
>
> left.append(cloud_position[c][dim] - 0.5*width[dim])
> right.append(cloud_position[c][dim] + 0.5*width[dim])
> dims.append(int(round((right[dim]-left[dim])/cellsize)))
>
> cgrid = pf.h.covering_grid(level,
> left_edge = left,
> dims=dims,
> num_ghost_zones=2)
>
>
> but gives me:
>
> TypeError Traceback (most recent call last)
> /home/tasker/yt-new2/src/yt-hg/scripts/iyt in <module>()
> ----> 1 execfile("export_hdf5_cube.py")
>
> /home/tasker/yt-new2/src/yt-hg/scripts/iyt in <module>()
> 51 left_edge = left,
> 52 dims=dims,
> ---> 53 num_ghost_zones=2)
> 54
> 55
>
> /home/tasker/yt-new2/src/yt-hg/yt/data_objects/data_containers.pyc in
> __init__(self, level, left_edge, dims, fields, pf, num_ghost_zones,
> use_pbar, **kwargs)
> 3689 self.level = level
> 3690 rdx = self.pf.domain_dimensions*self.pf.refine_by**level
> -> 3691 rdx[np.where(dims - 2 * num_ghost_zones <= 1)] = 1 # issue
> 602
> 3692 self.dds = self.pf.domain_width / rdx.astype("float64")
> 3693 self.ActiveDimensions = np.array(dims, dtype='int32')
>
> TypeError: unsupported operand type(s) for -: 'list' and 'int'
>
>
>
>
> This happens regardless of whether I use num_ghost_zones or not. If I don't
> have ghost_zones set, the error occurs at line 52, but still points to line
> 3691. Dims and left look fine:
>
> In [9]: dims
> Out[9]: [64, 64, 64]
>
> In [10]: left
> Out[10]: [20.424700000000001, 11.512700000000001, 15.7158]
>
> In [11]: level
> Out[11]: 5
>
> In [14]: rdx = pf.domain_dimensions*pf.refine_by**level
> In [15]: rdx
> Out[15]: array([4096, 4096, 4096])
>
>
> If I set num_ghost_zones = na.array([0,0,0]) then it runs. However, if I
> then try
>
> cgrid["x"]
>
> I hit more problems circulating around the same area:
>
> ValueError Traceback (most recent call last)
> /home/tasker/yt-new2/src/yt-hg/scripts/iyt in <module>()
> ----> 1 cgrid["y"]
>
> /home/tasker/yt-new2/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
>
> /home/tasker/yt-new2/src/yt-hg/yt/data_objects/data_containers.pyc in
> get_data(self, fields)
> 3733 try:
> 3734 #print "Generating", field
> -> 3735 self._generate_field(field)
> 3736 continue
> 3737 except NeedsOriginalGrid, ngt_exception:
>
> /home/tasker/yt-new2/src/yt-hg/yt/data_objects/data_containers.pyc in
> _generate_field(self, field)
> 3764 if self.pf.field_info.has_key(field):
> 3765 # First we check the validator; this might even raise!
> -> 3766 self.pf.field_info[field].check_available(self)
> 3767 self[field] = self.pf.field_info[field](self)
> 3768 else: # Can't find the field, try as it might
>
> /home/tasker/yt-new2/src/yt-hg/yt/data_objects/field_info_container.pyc in
> check_available(self, data)
> 354 """
> 355 for validator in self.validators:
> --> 356 validator(data)
> 357 # If we don't get an exception, we're good to go
> 358 return True
>
> /home/tasker/yt-new2/src/yt-hg/yt/data_objects/field_info_container.pyc in
> __call__(self, data)
> 482 if not data._spatial:
> 483 raise NeedsGridType(self.ghost_zones,self.fields)
> --> 484 if self.ghost_zones <= data._num_ghost_zones:
> 485 return True
> 486 raise NeedsGridType(self.ghost_zones,self.fields)
>
> ValueError: The truth value of an array with more than one element is
> ambiguous. Use a.any() or a.all()
>
>
> cgrid["Density"] and the velocities are fine.
>
> I'm suspecting this is because the position calculation in the code is not
> expecting an array for the ghost zone number?
>
> Oddly, I see from the mailing list is this reminiscent of a problem nyx was
> having.
arrays -- gets fixed over and over and over again. :( Can you report
which changeset you're on, and I'll push a fix?
-Matt
>
> Elizabeth
>
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