R help - Apr 2005 - Barplot and colors for legend

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

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))


Uwe Ligges

>>>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
Thanks for the quick help!

I am using R 2.0.1 under Windows 2000 and Uwes
suggestion helps.
And another thanks: Finally I realized that I don't
have the newest R version!

Thanks again,
   Werner

Well I don't know how I can live with myself. I guess I can't wait for
the site to mirror itself in case someone thinks I'm yesterday's man.
;-)
> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch
> [mailto:r-help-bounces at stat.math.ethz.ch]On Behalf Of Achim Zeileis
> Sent: Monday, 18 April 2005 10:56 PM
...
> Subject: Re: [R] Barplot and colors for legend
...
> This must be an old version of R ;-)
...

Tom Mulholland
Perth, WA, Australia.

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