[Matplotlib-users] Setting linestyle of contours with negative values problem

[Mark B. <ma...@gm...>]

Hello -

I tried to turn of the feature that makes contours with negative values
dashed.
According to the mailinglist this should go by setting: rcParams['
contour.negative_linestyle']=('None','None')
I tried any combination of the None, None syntax, or just 'solid', but
nothing worked.
Example shown below. I am using 0.90.1.
Thanks, Mark

from pylab import *
x,y = meshgrid(linspace(-3,3,10),linspace(-3,3,10))
rcParams['contour.negative_linestyle']=('None','None')
contour(x,y,x,colors='b')

Error message:

Traceback (most recent call last):
  File "<pyshell#10>", line 1, in ?
    contour(x,y,x,colors='b')
  File "C:\Python24\Lib\site-packages\matplotlib\pylab.py", line 1777, in
contour
    draw_if_interactive()
  File "C:\Python24\Lib\site-packages\matplotlib\backends\backend_tkagg.py",
line 59, in draw_if_interactive
    figManager.show()
  File "C:\Python24\Lib\site-packages\matplotlib\backends\backend_tkagg.py",
line 311, in show
    self.canvas.draw()
  File "C:\Python24\Lib\site-packages\matplotlib\backends\backend_tkagg.py",
line 154, in draw
    FigureCanvasAgg.draw(self)
  File "C:\Python24\Lib\site-packages\matplotlib\backends\backend_agg.py",
line 392, in draw
    self.figure.draw(renderer)
  File "C:\Python24\Lib\site-packages\matplotlib\figure.py", line 601, in
draw
    for a in self.axes: a.draw(renderer)
  File "C:\Python24\Lib\site-packages\matplotlib\axes.py", line 1286, in
draw
    a.draw(renderer)
  File "C:\Python24\Lib\site-packages\matplotlib\collections.py", line 700,
in draw
    transoffset)
ValueError: invalid literal for float(): None