matplotlib-users

[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

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

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

Mark,

  As a quick workaround, try

rcParams['contour.negative_linestyle']=(6, 0)

This is a hack--using dashes with zero-length spaces.

I expect to have a better solution in svn shortly.

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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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
> 
> 
> ------------------------------------------------------------------------
> 
> -------------------------------------------------------------------------
> This SF.net email is sponsored by DB2 Express
> Download DB2 Express C - the FREE version of DB2 express and take
> control of your XML. No limits. Just data. Click to get it now.
> http://sourceforge.net/powerbar/db2/
> 
> 
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> 
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users

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

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

Works for me.
Thanks, Mark

On 6/11/07, Eric Firing <ef...@ha...> wrote:
>
> 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
> >
> >
> > ------------------------------------------------------------------------
> >
> >
> -------------------------------------------------------------------------
> > This SF.net email is sponsored by DB2 Express
> > Download DB2 Express C - the FREE version of DB2 express and take
> > control of your XML. No limits. Just data. Click to get it now.
> > http://sourceforge.net/powerbar/db2/
> >
> >
> > ------------------------------------------------------------------------
> >
> > _______________________________________________
> > Matplotlib-users mailing list
> > Mat...@li...
> > https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>
>