[matplotlib-devel] Bug in legend() command.

[Ted D. <ted...@jp...>]

The legend() docs state:
  Make a legend with existing lines
   >>> legend()
   legend by itself will try and build a legend using the label
   property of the lines/patches/collections.  You can set the label of
   a line by doing plot(x, y, label='my data') or line.set_label('my
   data'). If label is set to '_nolegend_', the item will not be shown
   in legend.

But trying to pass '_nolegend_' doesn't seem to work.  And a grep through 
the code finds no instances of '_nolegend_'.

import pylab as p

x = p.arange( 0,3, .1 )
y1 = p.cos( x )
y2 = p.sin( x )
y3 = 2*p.sin( x )

p.plot( x, y1 )
p.plot( x, y2 )
p.plot( x, y3 )

p.legend( ( "cos(x)", "_nolegend_", "2*sin(x)" ) )

p.show()