Re: [Matplotlib-users] Legend with numpoints = 1

[Paul N. <pn...@ui...>]

Hello,

I have further investigated problems with legend() when numpoints = 1.
The images show what happens when numpoints = 1 for a Line2D, such as
when calling plot(), for a LineCollection, and for a
RegularPolyCollection, such as when using scatter(). As can be seen in
the figures, calling legend() with numpoints = 1 results in either an
absence of a line or a misplacement of a symbol or colored region,
creating an ugly legend.

I have made the three figures using the script included below,
line_collection.py from the examples, and scatter_demo.py from the examples.

I will send a second message that includes a patch that attempts to fix
the problems with legend() when numpoints=1, and some figures showing
the improvement in the legends.

Paul

---
#!/usr/bin/env python

import matplotlib
matplotlib.use('GTKAgg')

from pylab import *

x = arange(0.0, 5.0)
y = 2.0 * x

figure(1)
plot(x, y, 'o', label='symbol')
plot(x, y, 'k-', label='line')

leg=legend(loc='best',numpoints=1)

show()