[R] Multiple barplots on the same axis

[Marc Schwartz]

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