[R] Barplot and colors for legend

[Achim Zeileis]

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

> Werner Wernersen wrote:
> 
> > 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
> 
> 
> 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))

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

> 
> Uwe Ligges
> 
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