Hi all,
I just sent in a pull request #941 to update the documentation for
axes.arrow, because width,head_width,head_length, etc weren't
documented, but I ran into a couple of concerns that I thought to discuss:
1. the default width of 0.001 seems absurdly small. 0.05 seems better.
You can tell there's actually an arrowhead there with reasonable x- and
y-limits.
2. I believe that length_includes_head ought to default to True.
especially since the doc says: Draws arrow on specified axis from (*x*,
*y*) to (*x* + *dx*, *y* + *dy*), one would expect by default the tip of
the arrow to end at *x* + *dx*, *y* + *dy*
3. for the 'shape' arg, 'left' and 'right' seem to be backwards to me.
Given that the arrow defines a vector direction, say \hat{x}, then
'left' to me means only the part of the arrow in the +y half of the
plane should be drawn.
M
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