Matplotlib problem with plotting.tracks

[rsignell-usgs]

When trying to run https://www.wakari.io/sharing/bundle/kthyng/manual I'm getting a error related to dashes that seems related to using an outdated matplotlib?

plotting.tracks(lonp, latp, name, grid=grid)

---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
<ipython-input-13-1f333ccdc1f5> in <module>()
----> 1 plotting.tracks(lonp, latp, name, grid=grid)

/opt/anaconda/envs/manual/lib/python2.7/site-packages/tracpy/plotting.pyc in tracks(lonp, latp, fname, grid, fig, ax, Title, mers, pars)
    361         os.makedirs('figures')
    362 
--> 363     savefig('figures/' + fname + 'tracks.png',bbox_inches='tight')
    364     # savefig('figures/' + fname + 'tracks.pdf',bbox_inches='tight')
    365 

/opt/anaconda/envs/manual/lib/python2.7/site-packages/matplotlib/pyplot.pyc in savefig(*args, **kwargs)
    559 def savefig(*args, **kwargs):
    560     fig = gcf()
--> 561     return fig.savefig(*args, **kwargs)
    562 
    563 

/opt/anaconda/envs/manual/lib/python2.7/site-packages/matplotlib/figure.pyc in savefig(self, *args, **kwargs)
   1419             self.set_frameon(frameon)
   1420 
-> 1421         self.canvas.print_figure(*args, **kwargs)
   1422 
   1423         if frameon:

/opt/anaconda/envs/manual/lib/python2.7/site-packages/matplotlib/backend_bases.pyc in print_figure(self, filename, dpi, facecolor, edgecolor, orientation, format, **kwargs)
   2165                     orientation=orientation,
   2166                     dryrun=True,
-> 2167                     **kwargs)
   2168                 renderer = self.figure._cachedRenderer
   2169                 bbox_inches = self.figure.get_tightbbox(renderer)

/opt/anaconda/envs/manual/lib/python2.7/site-packages/matplotlib/backends/backend_agg.pyc in print_png(self, filename_or_obj, *args, **kwargs)
    503 
    504     def print_png(self, filename_or_obj, *args, **kwargs):
--> 505         FigureCanvasAgg.draw(self)
    506         renderer = self.get_renderer()
    507         original_dpi = renderer.dpi

/opt/anaconda/envs/manual/lib/python2.7/site-packages/matplotlib/backends/backend_agg.pyc in draw(self)
    449 
    450         try:
--> 451             self.figure.draw(self.renderer)
    452         finally:
    453             RendererAgg.lock.release()

/opt/anaconda/envs/manual/lib/python2.7/site-packages/matplotlib/artist.pyc in draw_wrapper(artist, renderer, *args, **kwargs)
     52     def draw_wrapper(artist, renderer, *args, **kwargs):
     53         before(artist, renderer)
---> 54         draw(artist, renderer, *args, **kwargs)
     55         after(artist, renderer)
     56 

/opt/anaconda/envs/manual/lib/python2.7/site-packages/matplotlib/figure.pyc in draw(self, renderer)
   1032         dsu.sort(key=itemgetter(0))
   1033         for zorder, a, func, args in dsu:
-> 1034             func(*args)
   1035 
   1036         renderer.close_group('figure')

/opt/anaconda/envs/manual/lib/python2.7/site-packages/matplotlib/artist.pyc in draw_wrapper(artist, renderer, *args, **kwargs)
     52     def draw_wrapper(artist, renderer, *args, **kwargs):
     53         before(artist, renderer)
---> 54         draw(artist, renderer, *args, **kwargs)
     55         after(artist, renderer)
     56 

/opt/anaconda/envs/manual/lib/python2.7/site-packages/matplotlib/axes.pyc in draw(self, renderer, inframe)
   2084 
   2085         for zorder, a in dsu:
-> 2086             a.draw(renderer)
   2087 
   2088         renderer.close_group('axes')

/opt/anaconda/envs/manual/lib/python2.7/site-packages/matplotlib/artist.pyc in draw_wrapper(artist, renderer, *args, **kwargs)
     52     def draw_wrapper(artist, renderer, *args, **kwargs):
     53         before(artist, renderer)
---> 54         draw(artist, renderer, *args, **kwargs)
     55         after(artist, renderer)
     56 

/opt/anaconda/envs/manual/lib/python2.7/site-packages/matplotlib/lines.pyc in draw(self, renderer)
    560                         drawFunc(pe_renderer, gc, tpath, affine_frozen)
    561                 else:
--> 562                     drawFunc(renderer, gc, tpath, affine.frozen())
    563 
    564         if self._marker:

/opt/anaconda/envs/manual/lib/python2.7/site-packages/matplotlib/lines.pyc in _draw_lines(self, renderer, gc, path, trans)
    936 
    937     def _draw_lines(self, renderer, gc, path, trans):
--> 938         self._lineFunc(renderer, gc, path, trans)
    939 
    940     def _draw_steps_pre(self, renderer, gc, path, trans):

/opt/anaconda/envs/manual/lib/python2.7/site-packages/matplotlib/lines.pyc in _draw_dashed(self, renderer, gc, path, trans)
    981         gc.set_linestyle('dashed')
    982         if self._dashSeq is not None:
--> 983             gc.set_dashes(0, self._dashSeq)
    984 
    985         renderer.draw_path(gc, path, trans)

/opt/anaconda/envs/manual/lib/python2.7/site-packages/matplotlib/backend_bases.pyc in set_dashes(self, dash_offset, dash_list)
    902             dl = np.asarray(dash_list)
    903             if np.any(dl <= 0.0):
--> 904                 raise ValueError("All values in the dash list must be positive")
    905         self._dashes = dash_offset, dash_list
    906 

ValueError: All values in the dash list must be positive

[kthyng]

This dashed line problem should be fixed now. It was in a basemap plot, and my computer and tracpy are all updated now, too.

Could you try this again? https://www.wakari.io/sharing/bundle/kthyng/manual

[rsignell-usgs]

I tried it again and got the exact same error. Did your updates get applied to the environment you shared?

[kthyng]

Thanks for trying again. Maybe the notebook wasn't properly updated, and now I actually can't get it to share (comes up with an unknown error every time). Also can't get it to run in an ipython terminal; the terminal just blacks out. I guess I'll have to get back to you later!

On Sun, Nov 17, 2013 at 7:53 PM, Rich Signell notifications@github.comwrote:

I tried it again and got the exact same error. Did your updates get applied to the environment you shared?

— Reply to this email directly or view it on GitHubhttps://github.com/kthyng/tracpy/issues/5#issuecomment-28670771 .

Kristen M. Thyng Postdoctoral Research Associate Department of Oceanography Texas A&M University http://kristenthyng.com