[yt-users] Error slicing 2D spherical FLASH data

Luke Zoltan Kelley lkelley at cfa.harvard.edu
Mon Jun 23 14:02:19 PDT 2014


They seem fine:

In [33]: dens = pf.all_data()['density']

In [34]: print dens.min()
9.99999968266e-20 g/cm**3

In [35]: print dens.max()
157.337768555 g/cm**3

These are the values I expected.


On Jun 23, 2014, at 4:47 PM, Nathan Goldbaum <nathan12343 at gmail.com> wrote:

> Hey Luke,
> 
> What do the raw density values in your data look like?
> 
> dens = ds.all_data()['density']
> print dens.max()
> print dens.min()
> 
> -Nathan
> 
> 
> On Mon, Jun 23, 2014 at 1:37 PM, Luke Zoltan Kelley <lkelley at cfa.harvard.edu> wrote:
> Hello again yt-users,
> 
> I'm trying to plot density from a FLASH simulation in 2D spherical.  I assumed that a 'SlicePlot' would be the natural choice, slicing along axis '2'/'z'/'phi'.
> 
> pf = load('starwind_hdf5_plt_cnt_0000')
> slc = SlicePlot(pf, 2, "density")
> 
> However, I get the error:
> 
> yt : [INFO     ] 2014-06-23 16:31:42,631 xlim = -400000000000.000000 400000000000.000000
> yt : [INFO     ] 2014-06-23 16:31:42,632 ylim = -400000000000.000000 400000000000.000000
> yt : [INFO     ] 2014-06-23 16:31:42,632 Making a fixed resolution buffer of (('gas', 'density')) 800 by 800
> yt : [INFO     ] 2014-06-23 16:31:42,698 xlim = -400000000000.000000 400000000000.000000
> yt : [INFO     ] 2014-06-23 16:31:42,698 ylim = -400000000000.000000 400000000000.000000
> yt : [INFO     ] 2014-06-23 16:31:42,699 Making a fixed resolution buffer of (('gas', 'density')) 800 by 800
> yt : [INFO     ] 2014-06-23 16:31:42,703 Making a fixed resolution buffer of (('gas', 'density')) 800 by 800
> ERROR: ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all() [numpy.ma.core]
> astropy: [ERROR    ] 2014-06-23 16:31:42,864 ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()
> ---------------------------------------------------------------------------
> ValueError                                Traceback (most recent call last)
> <ipython-input-26-62c5de6a0872> in <module>()
> ----> 1 slc = SlicePlot(pf, 2, "density")
> 
> /Users/lzkelley/Applications/yt/yt-x86_64/src/yt-hg/yt/visualization/plot_window.pyc in SlicePlot(pf, normal, fields, axis, *args, **kwargs)
>    1872             del kwargs['north_vector']
>    1873
> -> 1874         return AxisAlignedSlicePlot(pf, normal, fields, *args, **kwargs)
> 
> /Users/lzkelley/Applications/yt/yt-x86_64/src/yt-hg/yt/visualization/plot_window.pyc in __init__(self, pf, axis, fields, center, width, axes_unit, origin, fontsize, field_parameters, window_size, aspect)
>    1093         if axes_unit is None:
>    1094             axes_unit = get_axes_unit(width, pf)
> -> 1095         self.set_axes_unit(axes_unit)
>    1096
>    1097 class ProjectionPlot(PWViewerMPL):
> 
> /Users/lzkelley/Applications/yt/yt-x86_64/src/yt-hg/yt/visualization/plot_container.pyc in newfunc(*args, **kwargs)
>      67         rv = f(*args, **kwargs)
>      68         args[0]._plot_valid = False
> ---> 69         args[0]._setup_plots()
>      70         return rv
>      71     return newfunc
> 
> /Users/lzkelley/Applications/yt/yt-x86_64/src/yt-hg/yt/visualization/plot_window.pyc in _setup_plots(self)
>     836                 self._colormaps[f], extent, zlim,
>     837                 self.figure_size, fp.get_size(),
> --> 838                 self.aspect, fig, axes, cax)
>     839
>     840             axes_unit_labels = ['', '']
> 
> /Users/lzkelley/Applications/yt/yt-x86_64/src/yt-hg/yt/visualization/plot_window.pyc in __init__(self, data, cbname, cmap, extent, zlim, figure_size, fontsize, unit_aspect, figure, axes, cax)
>    1703             size, axrect, caxrect, zlim, figure, axes, cax)
>    1704
> -> 1705         self._init_image(data, cbname, cmap, extent, unit_aspect)
>    1706
>    1707         self.image.axes.ticklabel_format(scilimits=(-2, 3))
> 
> /Users/lzkelley/Applications/yt/yt-x86_64/src/yt-hg/yt/visualization/base_plot_types.pyc in _init_image(self, data, cbnorm, cmap, extent, aspect)
>     114                                       extent=extent, norm=norm, vmin=self.zmin,
>     115                                       aspect=aspect, vmax=self.zmax, cmap=cmap)
> --> 116         self.cb = self.figure.colorbar(self.image, self.cax)
>     117
>     118     def _repr_png_(self):
> 
> /Users/lzkelley/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/matplotlib/figure.pyc in colorbar(self, mappable, cax, ax, use_gridspec, **kw)
>    1449                 cax, kw = cbar.make_axes(ax, **kw)
>    1450         cax.hold(True)
> -> 1451         cb = cbar.colorbar_factory(cax, mappable, **kw)
>    1452
>    1453         self.sca(current_ax)
> 
> /Users/lzkelley/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/matplotlib/colorbar.pyc in colorbar_factory(cax, mappable, **kwargs)
>    1272         cb = ColorbarPatch(cax, mappable, **kwargs)
>    1273     else:
> -> 1274         cb = Colorbar(cax, mappable, **kwargs)
>    1275
>    1276     mappable.callbacksSM.connect('changed', cb.on_mappable_changed)
> 
> /Users/lzkelley/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/matplotlib/colorbar.pyc in __init__(self, ax, mappable, **kw)
>     875                 kw['alpha'] = mappable.get_alpha()
>     876
> --> 877             ColorbarBase.__init__(self, ax, **kw)
>     878
>     879     def on_mappable_changed(self, mappable):
> 
> /Users/lzkelley/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/matplotlib/colorbar.pyc in __init__(self, ax, cmap, norm, alpha, values, boundaries, orientation, ticklocation, extend, spacing, ticks, format, drawedges, filled, extendfrac, extendrect, label)
>     315         # The rest is in a method so we can recalculate when clim changes.
>     316         self.config_axis()
> --> 317         self.draw_all()
>     318
>     319     def _extend_lower(self):
> 
> /Users/lzkelley/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/matplotlib/colorbar.pyc in draw_all(self)
>     336         and do all the drawing.
>     337         '''
> --> 338         self._process_values()
>     339         self._find_range()
>     340         X, Y = self._mesh()
> 
> /Users/lzkelley/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/matplotlib/colorbar.pyc in _process_values(self, b)
>     650                 self.norm.vmin = 0
>     651                 self.norm.vmax = 1
> --> 652             b = self.norm.inverse(self._uniform_y(self.cmap.N + 1))
>     653             if self._extend_lower():
>     654                 b[0] = b[0] - 1
> 
> /Users/lzkelley/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/matplotlib/colors.pyc in inverse(self, value)
>    1001         if cbook.iterable(value):
>    1002             val = ma.asarray(value)
> -> 1003             return vmin * ma.power((vmax / vmin), val)
>    1004         else:
>    1005             return vmin * pow((vmax / vmin), value)
> 
> /Users/lzkelley/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/numpy/ma/core.pyc in __mul__(self, other)
>    3705     def __mul__(self, other):
>    3706         "Multiply other by self, and return a new masked array."
> -> 3707         return multiply(self, other)
>    3708     #
>    3709     def __rmul__(self, other):
> 
> /Users/lzkelley/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages/numpy/ma/core.pyc in __call__(self, a, b, *args, **kwargs)
>     936         # Case 1. : scalar
>     937         if not result.ndim:
> --> 938             if m:
>     939                 return masked
>     940             return result
> 
> ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()
> 
> 
> yt instinfo
> Version = 3.0-dev
> Changeset = 90a724768665
> 
> 
> Any help would be greatly appreciated,
> Thanks so much!
> Luke
> 
> 
> 
> 
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