On Wed, Mar 23, 2011 at 8:43 AM, Sean Lake <odysseus9...@gmail.com> wrote:
> Hello all,
>
> I need to draw different hatch styles on the different groups of a stacked
> bar chart in order to make a figure that works properly in black and white.
> The devil is, I can't figure out how to do it. When I pass the hatch option
> a list of values, I get an error.
>
Looks like the 'hatch' keyword must be a single string, not a list. You can
set the hatch style of the patches in the plot after calling hist():
-----
from numpy import *
import matplotlib.pyplot as plt
hatches = ['/', '+', '*', '\\', 'x', '.', '-', 'o']
result = plt.hist( [ linspace(1, 10, 20), linspace(1, 10, 40)],
bins=len(hatches), histtype="barstacked", rwidth=1.0, label=["a", "b"],
color=["red", "green"])
plist1 = result[2][0]
plist2 = result[2][1]
for h, p1, p2 in zip(hatches, plist1, plist2):
p1.set_hatch(h)
p2.set_hatch(h)
plt.show()
-----
Warren
> A simple example:
> from numpy import *
> import matplotlib.pyplot as plt
>
> plt.hist( [ linspace(1, 10, 20), linspace(1, 10, 40)], bins=range(10),
> histtype="barstacked", rwidth=1.0, label=["a", "b"],
> color=["red", "green"], hatch=["/", "x"] )
> plt.show()
>
> The resulting errors/outputs are at the end of the email.
>
> Thanks in advance for any help,
> Sean Lake
>
> In [4]: plt.hist( [ linspace(1, 10, 20), linspace(1, 10, 40)],
> bins=range(10), histtype
> ="barstacked", rwidth=1.0, label=["a", "b"],
> ...: color=["red", "green"], hatch=["/", "x"] )
> Out[4]:
> ([array([0, 3, 2, 2, 2, 2, 2, 2, 2]), array([0, 5, 4, 4, 5, 4, 4, 5, 4])],
> array([0, 1, 2, 3, 4, 5, 6, 7, 8, 9]),
> <a list of 2 Lists of Patches objects>)
>
> In [5]: plt.show()
> ---------------------------------------------------------------------------
> TypeError Traceback (most recent call last)
>
> /sw/lib/python2.6/site-packages/matplotlib/backends/backend_gtk.pyc in
> expose_event(self, widget, event)
> 391 x, y, w, h = self.allocation
> 392 self._pixmap_prepare (w, h)
> --> 393 self._render_figure(self._pixmap, w, h)
> 394 self._need_redraw = False
> 395
>
> /sw/lib/python2.6/site-packages/matplotlib/backends/backend_gtkagg.pyc in
> _render_figure(self, pixmap, width, height)
> 73 def _render_figure(self, pixmap, width, height):
> 74 if DEBUG: print 'FigureCanvasGTKAgg.render_figure'
> ---> 75 FigureCanvasAgg.draw(self)
> 76 if DEBUG: print 'FigureCanvasGTKAgg.render_figure pixmap',
> pixmap
> 77 #agg_to_gtk_drawable(pixmap, self.renderer._renderer, None)
>
>
> /sw/lib/python2.6/site-packages/matplotlib/backends/backend_agg.pyc in
> draw(self)
> 392
> 393 self.renderer = self.get_renderer()
> --> 394 self.figure.draw(self.renderer)
> 395
> 396 def get_renderer(self):
>
> /sw/lib/python2.6/site-packages/matplotlib/artist.pyc in
> draw_wrapper(artist, renderer, *args, **kwargs)
> 53 def draw_wrapper(artist, renderer, *args, **kwargs):
> 54 before(artist, renderer)
> ---> 55 draw(artist, renderer, *args, **kwargs)
> 56 after(artist, renderer)
> 57
>
> /sw/lib/python2.6/site-packages/matplotlib/figure.pyc in draw(self,
> renderer)
> 796 dsu.sort(key=itemgetter(0))
> 797 for zorder, func, args in dsu:
> --> 798 func(*args)
> 799
> 800 renderer.close_group('figure')
>
> /sw/lib/python2.6/site-packages/matplotlib/artist.pyc in
> draw_wrapper(artist, renderer, *args, **kwargs)
> 53 def draw_wrapper(artist, renderer, *args, **kwargs):
> 54 before(artist, renderer)
> ---> 55 draw(artist, renderer, *args, **kwargs)
> 56 after(artist, renderer)
> 57
>
> /sw/lib/python2.6/site-packages/matplotlib/axes.pyc in draw(self, renderer,
> inframe)
> 1932
> 1933 for zorder, a in dsu:
> -> 1934 a.draw(renderer)
> 1935
> 1936 renderer.close_group('axes')
>
> /sw/lib/python2.6/site-packages/matplotlib/artist.pyc in
> draw_wrapper(artist, renderer, *args, **kwargs)
> 53 def draw_wrapper(artist, renderer, *args, **kwargs):
> 54 before(artist, renderer)
> ---> 55 draw(artist, renderer, *args, **kwargs)
> 56 after(artist, renderer)
> 57
>
> /sw/lib/python2.6/site-packages/matplotlib/patches.pyc in draw(self,
> renderer)
> 381 path_effect.draw_path(renderer, gc, tpath, affine,
> rgbFace)
> 382 else:
> --> 383 renderer.draw_path(gc, tpath, affine, rgbFace)
> 384
> 385 gc.restore()
>
> /sw/lib/python2.6/site-packages/matplotlib/backends/backend_agg.pyc in
> draw_path(self, gc, path, transform, rgbFace)
> 115 self._renderer.draw_path(gc, p, transform, rgbFace)
> 116 else:
> --> 117 self._renderer.draw_path(gc, path, transform, rgbFace)
> 118
> 119 def draw_mathtext(self, gc, x, y, s, prop, angle):
>
> /sw/lib/python2.6/site-packages/matplotlib/backend_bases.pyc in
> get_hatch_path(self, density)
> 865 if self._hatch is None:
> 866 return None
> --> 867 return Path.hatch(self._hatch, density)
> 868
> 869
>
> /sw/lib/python2.6/site-packages/matplotlib/path.pyc in hatch(cls,
> hatchpattern, density)
> 662 return None
> 663
> --> 664 hatch_path = cls._hatch_dict.get((hatchpattern, density))
> 665 if hatch_path is not None:
> 666 return hatch_path
>
> TypeError: unhashable type: 'list'
> ---------------------------------------------------------------------------
> TypeError Traceback (most recent call last)
>
> /sw/lib/python2.6/site-packages/matplotlib/backends/backend_gtk.pyc in
> expose_event(self, widget, event)
> 391 x, y, w, h = self.allocation
> 392 self._pixmap_prepare (w, h)
> --> 393 self._render_figure(self._pixmap, w, h)
> 394 self._need_redraw = False
> 395
>
> /sw/lib/python2.6/site-packages/matplotlib/backends/backend_gtkagg.pyc in
> _render_figure(self, pixmap, width, height)
> 73 def _render_figure(self, pixmap, width, height):
> 74 if DEBUG: print 'FigureCanvasGTKAgg.render_figure'
> ---> 75 FigureCanvasAgg.draw(self)
> 76 if DEBUG: print 'FigureCanvasGTKAgg.render_figure pixmap',
> pixmap
> 77 #agg_to_gtk_drawable(pixmap, self.renderer._renderer, None)
>
>
> /sw/lib/python2.6/site-packages/matplotlib/backends/backend_agg.pyc in
> draw(self)
> 392
> 393 self.renderer = self.get_renderer()
> --> 394 self.figure.draw(self.renderer)
> 395
> 396 def get_renderer(self):
>
> /sw/lib/python2.6/site-packages/matplotlib/artist.pyc in
> draw_wrapper(artist, renderer, *args, **kwargs)
> 53 def draw_wrapper(artist, renderer, *args, **kwargs):
> 54 before(artist, renderer)
> ---> 55 draw(artist, renderer, *args, **kwargs)
> 56 after(artist, renderer)
> 57
>
> /sw/lib/python2.6/site-packages/matplotlib/figure.pyc in draw(self,
> renderer)
> 796 dsu.sort(key=itemgetter(0))
> 797 for zorder, func, args in dsu:
> --> 798 func(*args)
> 799
> 800 renderer.close_group('figure')
>
> /sw/lib/python2.6/site-packages/matplotlib/artist.pyc in
> draw_wrapper(artist, renderer, *args, **kwargs)
> 53 def draw_wrapper(artist, renderer, *args, **kwargs):
> 54 before(artist, renderer)
> ---> 55 draw(artist, renderer, *args, **kwargs)
> 56 after(artist, renderer)
> 57
>
> /sw/lib/python2.6/site-packages/matplotlib/axes.pyc in draw(self, renderer,
> inframe)
> 1932
> 1933 for zorder, a in dsu:
> -> 1934 a.draw(renderer)
> 1935
> 1936 renderer.close_group('axes')
>
> /sw/lib/python2.6/site-packages/matplotlib/artist.pyc in
> draw_wrapper(artist, renderer, *args, **kwargs)
> 53 def draw_wrapper(artist, renderer, *args, **kwargs):
> 54 before(artist, renderer)
> ---> 55 draw(artist, renderer, *args, **kwargs)
> 56 after(artist, renderer)
> 57
>
> /sw/lib/python2.6/site-packages/matplotlib/patches.pyc in draw(self,
> renderer)
> 381 path_effect.draw_path(renderer, gc, tpath, affine,
> rgbFace)
> 382 else:
> --> 383 renderer.draw_path(gc, tpath, affine, rgbFace)
> 384
> 385 gc.restore()
>
> /sw/lib/python2.6/site-packages/matplotlib/backends/backend_agg.pyc in
> draw_path(self, gc, path, transform, rgbFace)
> 115 self._renderer.draw_path(gc, p, transform, rgbFace)
> 116 else:
> --> 117 self._renderer.draw_path(gc, path, transform, rgbFace)
> 118
> 119 def draw_mathtext(self, gc, x, y, s, prop, angle):
>
> /sw/lib/python2.6/site-packages/matplotlib/backend_bases.pyc in
> get_hatch_path(self, density)
> 865 if self._hatch is None:
> 866 return None
> --> 867 return Path.hatch(self._hatch, density)
> 868
> 869
>
> /sw/lib/python2.6/site-packages/matplotlib/path.pyc in hatch(cls,
> hatchpattern, density)
> 662 return None
> 663
> --> 664 hatch_path = cls._hatch_dict.get((hatchpattern, density))
> 665 if hatch_path is not None:
> 666 return hatch_path
>
> TypeError: unhashable type: 'list'
> ---------------------------------------------------------------------------
> TypeError Traceback (most recent call last)
>
> /sw/lib/python2.6/site-packages/matplotlib/backends/backend_gtk.pyc in
> expose_event(self, widget, event)
> 391 x, y, w, h = self.allocation
> 392 self._pixmap_prepare (w, h)
> --> 393 self._render_figure(self._pixmap, w, h)
> 394 self._need_redraw = False
> 395
>
> /sw/lib/python2.6/site-packages/matplotlib/backends/backend_gtkagg.pyc in
> _render_figure(self, pixmap, width, height)
> 73 def _render_figure(self, pixmap, width, height):
> 74 if DEBUG: print 'FigureCanvasGTKAgg.render_figure'
> ---> 75 FigureCanvasAgg.draw(self)
> 76 if DEBUG: print 'FigureCanvasGTKAgg.render_figure pixmap',
> pixmap
> 77 #agg_to_gtk_drawable(pixmap, self.renderer._renderer, None)
>
>
> /sw/lib/python2.6/site-packages/matplotlib/backends/backend_agg.pyc in
> draw(self)
> 392
> 393 self.renderer = self.get_renderer()
> --> 394 self.figure.draw(self.renderer)
> 395
> 396 def get_renderer(self):
>
> /sw/lib/python2.6/site-packages/matplotlib/artist.pyc in
> draw_wrapper(artist, renderer, *args, **kwargs)
> 53 def draw_wrapper(artist, renderer, *args, **kwargs):
> 54 before(artist, renderer)
> ---> 55 draw(artist, renderer, *args, **kwargs)
> 56 after(artist, renderer)
> 57
>
> /sw/lib/python2.6/site-packages/matplotlib/figure.pyc in draw(self,
> renderer)
> 796 dsu.sort(key=itemgetter(0))
> 797 for zorder, func, args in dsu:
> --> 798 func(*args)
> 799
> 800 renderer.close_group('figure')
>
> /sw/lib/python2.6/site-packages/matplotlib/artist.pyc in
> draw_wrapper(artist, renderer, *args, **kwargs)
> 53 def draw_wrapper(artist, renderer, *args, **kwargs):
> 54 before(artist, renderer)
> ---> 55 draw(artist, renderer, *args, **kwargs)
> 56 after(artist, renderer)
> 57
>
> /sw/lib/python2.6/site-packages/matplotlib/axes.pyc in draw(self, renderer,
> inframe)
> 1932
> 1933 for zorder, a in dsu:
> -> 1934 a.draw(renderer)
> 1935
> 1936 renderer.close_group('axes')
>
> /sw/lib/python2.6/site-packages/matplotlib/artist.pyc in
> draw_wrapper(artist, renderer, *args, **kwargs)
> 53 def draw_wrapper(artist, renderer, *args, **kwargs):
> 54 before(artist, renderer)
> ---> 55 draw(artist, renderer, *args, **kwargs)
> 56 after(artist, renderer)
> 57
>
> /sw/lib/python2.6/site-packages/matplotlib/patches.pyc in draw(self,
> renderer)
> 381 path_effect.draw_path(renderer, gc, tpath, affine,
> rgbFace)
> 382 else:
> --> 383 renderer.draw_path(gc, tpath, affine, rgbFace)
> 384
> 385 gc.restore()
>
> /sw/lib/python2.6/site-packages/matplotlib/backends/backend_agg.pyc in
> draw_path(self, gc, path, transform, rgbFace)
> 115 self._renderer.draw_path(gc, p, transform, rgbFace)
> 116 else:
> --> 117 self._renderer.draw_path(gc, path, transform, rgbFace)
> 118
> 119 def draw_mathtext(self, gc, x, y, s, prop, angle):
>
> /sw/lib/python2.6/site-packages/matplotlib/backend_bases.pyc in
> get_hatch_path(self, density)
> 865 if self._hatch is None:
> 866 return None
> --> 867 return Path.hatch(self._hatch, density)
> 868
> 869
>
> /sw/lib/python2.6/site-packages/matplotlib/path.pyc in hatch(cls,
> hatchpattern, density)
> 662 return None
> 663
> --> 664 hatch_path = cls._hatch_dict.get((hatchpattern, density))
> 665 if hatch_path is not None:
> 666 return hatch_path
>
> TypeError: unhashable type: 'list'
>
>
>
> ------------------------------------------------------------------------------
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growing manageability and security demands of your customers. Businesses
are taking advantage of Intel(R) vPro (TM) technology - will your software
be a part of the solution? Download the Intel(R) Manageability Checker
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