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Barplot and colors for legend

3 messages · Werner Wernersen, Uwe Ligges, Achim Zeileis

Werner Wernersen
# 
Hi all!

One quick question: How do I get the standard colors
used by barplot? I have 
some stacked bars and would like to add a horizontal
legend via legend() but I 
don't know how to find the colors for the fills of the
legend points.

Thanks!
   Werner
Uwe Ligges
#
Werner Wernersen wrote:

            

      
      
      
    

        
Type
   barplot.default
and read the code:

for a vector: "grey",
for a matrix: grey(seq(0.3^2.2, 0.9^2.2, length = nrow(height))^(1/2.2))


Uwe Ligges

  
  


  


      

    

    

      
      

        


  

        

      Achim Zeileis
    

    

      
      #
    

  


  

      
On Mon, 18 Apr 2005 16:48:42 +0200 Uwe Ligges wrote:

        

            

      
      
      
    

        
This must be an old version of R ;-)

In R 2.1.0, there is a function gray.colors() which creates a vector of
gamma-corrected gray colors (and is used in barplot.default).

Best,
Z