Hi. The docs for Annotation [1] say that negative coordinates given for [ figure | axes ] [ points | pixels ] xycoords are to be interpreted relative to the top-right corner, but I found that they act relative to the bottom-left corner as for positive coordinates. This can be seen in the attached script and in the annotation_demo.py example [2], where the string "bottom right (points)" bleeds off the left edge of the figure.
[1] http://matplotlib.sourceforge.net/api/artist_api.html#matplotlib.text.Annotati on [2] http://matplotlib.sourceforge.net/examples/pylab_examples/annotation_demo.html
import matplotlib.pyplot as plt
fig = plt.figure()
axes = fig.add_subplot(1, 1, 1)
for x in (12, -12):
for y in (12, -12):
axes.annotate('X', (x, y), xycoords='axes points',
color='r', ha='center', va='center')
plt.show()
<<attachment: corners.png>>
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