Re: [Matplotlib-users] Arrow with a dashed line

[Jae-Joon Lee]

Just to clarify, both arrowstyle='simple' and arrowstyle='-|' draw
arrows as patches. In your first example with arrowstyle='simple', the
arrow is drawn as filled patch without edges, i.e., linestyle is not
effective. arrowstyle=-| also uses a patch but no fill, only
stroke.

Regards,

-JJ

On Tue, Mar 13, 2012 at 3:28 AM, Tony Yu tsy...@gmail.com wrote:
 Nevermind: I though arrowstyle='simple' and arrowstyle='-|' were the same
 thing, but apparently not (I guess one draws the line as a patch, and the
 other as a line). So the following works as expected:

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Re: [Matplotlib-users] Arrow with a dashed line

[Tony Yu]

On Sun, Mar 11, 2012 at 2:13 PM, Tony Yu tsy...@gmail.com wrote:

 Is it possible to draw an arrow with a dashed line?

 I tried using a fancy arrow patch and set the linestyle:

 #~~~
 import matplotlib.pyplot as plt

 fix, ax = plt.subplots()
 ax.set_xlim((-1,5))
 ax.set_ylim((-5,3))

 ax.annotate('simple', xy=(2., -1),  xycoords='data',
 xytext=(100, 60), textcoords='offset points',
 size=20,
 arrowprops=dict(arrowstyle=simple,
 fc=0.6, ec=none, linestyle='dashed',
 connectionstyle=arc3,rad=0.3),
 )
 plt.show()
 #~~~

 But the linestyle argument just gets ignored.

 Is there a way to grab the connection path object and then change that to
 a dashed line? Actually, I'm not even sure it's possible to set a linestyle
 for a Path (since dashed lines are normally Line2D). Suggestions?

 Thanks,
 -Tony



Nevermind: I though arrowstyle='simple' and arrowstyle='-|' were the same
thing, but apparently not (I guess one draws the line as a patch, and the
other as a line). So the following works as expected:

#
import matplotlib.pyplot as plt

fix, ax = plt.subplots()
ax.set_xlim((-1,5))
ax.set_ylim((-5,3))

ax.annotate('simple', xy=(2., -1),  xycoords='data',
xytext=(100, 60), textcoords='offset points',
size=20,
arrowprops=dict(arrowstyle=-|,
fc=k, ec=k, linestyle='dashed',
connectionstyle=arc3,rad=0.3),
)
plt.show()
#~~~
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