Hi,

Currently, the arrow class doesn't let you update the coordinates after creating the patch. That is, one must remove the old patch and create a new one just to move the arrows. This seems fairly inefficient.

Would it be possible to add some setter methods to let one change the arrow position and size without recreating a new one?

The motivation for this is that removing and adding a new patch requires a full re-draw (afaik) which is slow.

Thanks!

Matplotlib version

• Operating system: Windows 10
• Matplotlib version: 3.0.3
• Matplotlib backend (print(matplotlib.get_backend())): qt5agg
• Python version: 3.7