R help - Nov 2010 - filled.contour colorbar without black color separators?

Dear list members, 

I have been using filled.contour in order to plot EEG data. For the colors, I
used a conventional ramp from blue to red (blue - green - yellow - red), and 100
color levels to make the plot looking smooth:

(...) color.palette = colorRampPalette(c('blue','green', 
'yellow','red'), space='rgb'), nlevels = 100 (...)

 My problem ist that filled.contour draws a black bar as a separation between
each color of the color bar (color key) so that color bar becomes essentially
black if I use many color levels. Is there a way to  turn of this behavior? Any
advice would be greatly appreciated,
Gregor 



-- 
Dr. rer. nat. Gregor Volberg
<gregor.volberg@psychologie.uni-regensburg.de> (
mailto:gregor.volberg@psychologie.uni-regensburg.de )
University of Regensburg
Institute for Experimental Psychology
93040 Regensburg, Germany
Tel: +49 941 943 3862 
Fax: +49 941 943 3233
http://www.psychologie.uni-regensburg.de/Greenlee/team/volberg/volberg.html



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On Nov 5, 2010, at 7:36 AM, Gregor Volberg wrote:
>
> Dear list members,
>
> I have been using filled.contour in order to plot EEG data. For the  
> colors, I used a conventional ramp from blue to red (blue - green -  
> yellow - red), and 100 color levels to make the plot looking smooth:
>
> (...) color.palette = colorRampPalette(c('blue','green',   
> 'yellow','red'), space='rgb'), nlevels = 100 (...)
>
> My problem ist that filled.contour draws a black bar as a separation  
> between each color of the color bar (color key) so that color bar  
> becomes essentially black if I use many color levels. Is there a way  
> to  turn of this behavior? Any advice would be greatly appreciated,
I am not being categorical about this but it doesn't look simple.  I  
have looked at the code and the parameter list and had hoped to see  
either a way to pass parameters to legend or perhaps to change the  
code. Neither of those appears possible, since parameters are not sent  
to legend and legend isn't even called within the code. If I had this  
need. I would be looking at moving my plotting over to levelplot in  
package:lattice.

-- 
David
> Gregor
>
>
David Winsemius, MD
West Hartford, CT