On Wed, Jul 28, 2010 at 3:56 PM, Thomas Robitaille <
thomas.robitai...@gmail.com> wrote:
> Hi,
>
> How does one plot an arrow in a log log plot? In the following example, I
> can't get the arrow head, regardless of what value I use for the head width:
>
> import matplotlib as mpl
> mpl.use('Agg')
> import matplotlib.pyplot as plt
>
> fig = plt.figure()
> ax = fig.add_subplot(1,1,1)
> ax.arrow(0.2,0.2,0.5,0.5,head_width=1.)
> ax.set_xscale('log')
> ax.set_yscale('log')
> ax.set_xlim(0.1,1.)
> ax.set_ylim(0.1,1.)
> fig.savefig('test.png')
>
> In addition, the documentation for arrow does not even mention any arrow
> specific options such as the head width/length, and the example plot is
> missing (there is a 'Exception occurred rendering plot.' message instead)
>
>
> http://matplotlib.sourceforge.net/api/axes_api.html?highlight=arrow#matplotlib.axes.Axes.arrow
>
> Thanks for any help,
>
> Thomas
>
I can't say anything with regards to why your figure is not working, or why
the plot fails to render online (it renders just fine for myself when built
locally). However, I have noticed that the lack of information regarding
the options for arrow seems to be related to the docstring for arrow()
referring to the kwargs for FancyArrow, but none of those are defined. And
the docstring for FancyArrow appears to be incomplete.
Ben Root
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