Hi list,

I'm trying to annotate points on a graph by drawing a simple line from the point on the axis to the top left corner of the text. I can't figure out, how to use pyplot.annotate so that it turns of the arrow head and I can use horizontalalignment (ha) and verticalalignment (va). When I use arrowstyle='-' in the arrowprops dictionary ha and va don't work. Instead I use relpos=(0, 1) in the arrowprops dictionary, which works, but only when I call the annotate function the first time. Below is a minimal example.

I'm using mpl version 1.0. as part of EPD 7.1 on Mac OS X 10.5.

Any hints on how to achieve my goal would be greatly appreciated!

Best regards,

Markus

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The following code reproduces my problem

import numpy as np
import matplotlib.pyplot as plt

data = np.linspace(1,10)
plt.plot(data, data)
anno_args = {
    'annotation_clip': False,
    'arrowprops': dict(arrowstyle='-', relpos=(0, 1)),
    }
plt.annotate('Good relpos', (3, 3), xytext = (3, 2), **anno_args)
plt.annotate('Bad relpos', (6, 6), xytext = (6, 5), **anno_args)
plt.annotate('No ha/va', (5, 5), xytext = (5, 4), arrowprops=dict(arrowstyle='-'),
             ha='left', va='top')
plt.show()