R help - Oct 2006 - Multiple barplots on the same axis

Hi

R newbie here :)

I need to plot 3 barplots in the same axis, something like

   |
   |      _            _            _
   |     | | _        | | _        | | _ 
   |   _ | || |     _ | || |     _ | || |
   |  | || || |    | || || |    | || || |
  -+-----------------------------------------
   |     v1           v2           v3


Is there any documentation describing how to achieve that, and what data
file layout would make the job easier?

Thanks in advance,
Andre

On Thu, 2006-10-12 at 23:08 -0300, Andre Nathan wrote:
> Hi
> 
> R newbie here :)
> 
> I need to plot 3 barplots in the same axis, something like
> 
>    |
>    |      _            _            _
>    |     | | _        | | _        | | _ 
>    |   _ | || |     _ | || |     _ | || |
>    |  | || || |    | || || |    | || || |
>   -+-----------------------------------------
>    |     v1           v2           v3
> 
> 
> Is there any documentation describing how to achieve that, and what data
> file layout would make the job easier?
> 
> Thanks in advance,
> Andre
There are examples in ?barplot, where the VADeaths data is used. The key
is the use of 'beside = TRUE', to enable grouped bars:

barplot(VADeaths, beside = TRUE,
        col = c("lightblue", "mistyrose",
"lightcyan",
                "lavender", "cornsilk"),
        legend = rownames(VADeaths), ylim = c(0, 100))

To see what the VADeaths data set looks like:

 > VADeaths

See ?barplot for more information.

There is also an R Graphics Gallery with code at:

http://addictedtor.free.fr/graphiques/index.php

and From Data to Graphics at:

http://zoonek2.free.fr/UNIX/48_R/03.html

Both of which are helpful.

HTH,

Marc Schwartz

--- Andre Nathan <andre at digirati.com.br> wrote:
> Hi
> 
> R newbie here :)
> 
> I need to plot 3 barplots in the same axis,
> something like
> 
>    |
>    |      _            _            _
>    |     | | _        | | _        | | _ 
>    |   _ | || |     _ | || |     _ | || |
>    |  | || || |    | || || |    | || || |
>   -+-----------------------------------------
>    |     v1           v2           v3
> 
> 
> Is there any documentation describing how to achieve
> that, and what data
> file layout would make the job easier?
> 
> Thanks in advance,
> Andre
You might have a look at "Using R for Data Analysis
and Graphics - Introduction, Examples and Commentary? 
by John Maindonald
and at
?An Introduction to S and the Hmisc and Design
Libraries?
 by Carlos Alzola and Frank E. Harrell

Both are available on the R site : Follow the trail
Other > Contributed documentation.

Are you aware of R Site Search
http://finzi.psych.upenn.edu/search.html?  

To do what you want using traditional R graphics you
should read up on par() Type   ?par  

Here is some really quick and dirty code that might
help as a starting point. 
aa<- 1:4
bb <- c(2,3,5,6)
cc <- c(4,5,6,7)
par(mfcol=c(1,3))
barplot(aa)
barplot(bb)
barplot(cc)