On Wed, Aug 17, 2011 at 11:59 PM, <mkzo...@comcast.net> wrote:
> I'm trying to create a dotplot with some grouping.
>
> I've been able to create what I want using dotchart (basic graphics), but
> can't quite get it using dotplot (lattice). I prefer to use lattice (or
> ggplot2) because I think it's a bit easier to control some other aspects of
> the plot appearance.
>
> Basically, w/ lattice I've not been able to get the y-axis label to include
> the group variable.
>
> I'd like...
>
> A
> 1
> 2
> B
> 1
> 2
> 3
> 4
> C
> 1
> 2
> 3
>
> I'm getting...
> 1
> 2
> 1
> 2
> 3
> 4
> 1
> 2
> 3
>
> The following example code illustrates....
>
> set.seed(18)
> dta <- data.frame(var1=factor(c("A", "A", "B", "B", "B", "B", "C", "C", "C")),
> var2=c(1,2,1,2,3,4,1,2,3),
> var3=round(runif(9,1,10),1),
> plotorder=9:1)
>
> dta
>
> windows(3,3)
> dotchart(dta$var3[order(dta$var1, -dta$var2)], groups=dta$var1,
> labels=dta$var2[order(dta$var1, -dta$var2)], cex=.75,
> gcolor=c("blue", "red", "dark green"),
> col=c(rep("blue",2), rep("red",4), rep("dark green",3)),
> axes=NULL)
Well, the more "lattice-like" version of this would be
dta$var2fac <- factor(dta$var2, levels = rev(sort(unique(dta$var2))))
dotplot(var2fac ~ var3 | var1, data=dta, groups=var1,
col=c("blue", "red", "dark green"),
layout = c(1, 3), as.table = TRUE,
scales=list(y = list(relation = "sliced")))
But if you really want the dotchart()-like output, you can try
dta$var12fac <- with(dta, interaction(var2fac, factor(var1, levels =
rev(levels(var1)))))
dta$var12fac <- droplevels(dta$var12fac)
lab <- substring(levels(dta$var12fac), 1, 1)
dotplot(var12fac ~ var3,
data = dta, groups=var1,
col=c("blue", "red", "dark green"),
scales = list(y = list(labels = lab,
col = rep(c("dark green", "red", "blue"),
c(3, 4, 2)))),
ylab = list(label = c("C", "B", "A"),
y = c(3, 7, 9) / 9.2,
rot = 0, col = c("dark green", "red", "blue")))
-Deepayan
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