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

[Eric F. <ef...@ha...>]

Mark,

Presumably the mailing list method worked at one time, but it would be 
obscure and unintuitive even if it worked now.  There are no other 
explicit dash styles given as a pair of numbers in the rc file, so the 
change I made in svn is to use the strings "solid" and "dashed"; the 
two-float specification is deprecated.

Eric

Mark Bakker wrote:
> 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
> 
> 
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