[R] Lattice: Customizing point-sizes with groups
sdorairaj at gmail.com
Tue Mar 10 10:49:03 CET 2009
xyplot(y ~ x, temp, groups = groups,
par.settings = list(
superpose.symbol = list(
cex = c(1, 3),
pch = 19,
col = c("blue", "red"))))
for other settings you might want to change.
Also, you should drop the ";" from all your scripts.
On Mon, Mar 9, 2009 at 6:49 PM, Paul Boutros <paul.boutros at utoronto.ca> wrote:
> I am creating a scatter-plot in lattice, and I would like to customize the
> size of each point so that some points are larger and others smaller.
> Here's a toy example:
> temp <- data.frame(
> x = 1:10,
> y = 1:10,
> cex = rep( c(1,3), 5),
> groups = c( rep("A", 5), rep("B", 5) )
> xyplot(y ~ x, temp, cex = temp$cex, pch = 19);
> This works just fine if I create a straight xy-plot, without groups.
> However when I introduce groupings the cex argument specifies the
> point-size for the entire group. For example:
> xyplot(y ~ x, temp, cex = temp$cex, pch = 19, group = groups);
> Is it possible to combine per-spot sizing with groups in some way? One
> work-around is to manually specify all graphical parameters, but I thought
> there might be a better way than this:
> temp$col <- rep("blue", 10);
> temp$col[temp$groups == "B"] <- "red";
> xyplot(y ~ x, temp, cex = temp$cex, pch = 19, col = temp$col);
> Any suggestions/advice is much appreciated!
> R-help at r-project.org mailing list
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
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