[R] ordering in dotplot

[Chuck Cleland]

Luca De Benedictis wrote:
> the dataset I am using (data.it) is organized as follows
> ...    ...    ...    ...
> and plotting it using dotplot, I specified the script as:
> 
> library(lattice)
> attach(data.ita)
> dotplot(reg~stp | partner, data=data.ita, groups=btp,
>            xlab=list("Data - 
> it",cex=1.5),col=c("black","red"),aspect=0.3,as.table=TRUE,xlim=c(-1,1))
> detach(data.ita)
> 
> In the resulting plot the variable "reg" is ordered alphabetically. 
> Instead, I would like the variable to be plotted in the following order: 
> "s", "s-f", "d", "d-f".

Make that an ordered factor as follows:

data.it$reg <- ordered(data.it$reg, levels=c("s", "s-f", "d", "d-f"))

hope this helps,

Chuck Cleland

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Chuck Cleland, Ph.D.
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