Re: [Matplotlib-users] using fill, but really need a box

[John H. <jd...@gm...>]

On Fri, May 9, 2008 at 2:31 PM, Bryan Fodness <bry...@gm...> wrote:
> i have been using the fill function to highlight a region on my plot, but
> now i do not want it to be filled.  i have tried using alpha=0.1, but that
> also makes my edgecolor transparent.  is there a "box" function that does
> not fill a region yet still has the outline of the "box".  i tried using
> patch.rectangle, but it was not what i needed.

Use a matplotlib.patches.Rectangle, and set the facecolor='None':

import matplotlib.pyplot as plt
import matplotlib.patches as patches

fig = plt.figure()
ax = fig.add_subplot(111)
ax.plot([1,2,3], [1,2,3])

# use zorder to make sure it is over the line
rect = patches.Rectangle((1.5, 1.5), 1.0, 1.0, facecolor='None', zorder=10)
ax.add_patch(rect)
plt.show()

Hope this helps,
JDH