Lattice dotplot with symbols sized and colored

Sundar Dorai-Raj · 2005-05-03T10:42:07Z

David Kidd wrote on 5/3/2005 3:08 AM: > > Apologies if this is a naive beginners question. > > I am trying to create a dotplot with the lattice dotplot function in > which my dots are colored differently depending on if positive or > negative and sized by sp.nc.bdrs.data$mwZ > > I have tried... > > dotplot(sporder ~ cvarorder | direct, data=sp.nc.bdrs.data, > cex=abs(sp.nc.bdrs.data$mwZ * 0.05), > xlab="climate variables", > ylab="species",col= sp.nc.bdrs.data$mysign, > scales = list(y = l

Sundar Dorai-Raj

Tue, May 3, 2005 3:42 AM

David Kidd wrote on 5/3/2005 3:08 AM:

Hi David,

I think you're on the right track using groups. However, you just have 
to set the trellis arguments correctly. For example,

library(lattice)
my.theme <- function() {
   theme <- col.whitebg()
   symb <- theme$superpose.symbol
   symb$cex <- seq(0.5, 1.5, length = length(symb$cex))
   # symb$pch is c(1, 3, 6, 0, 5, 16, 17) by default for col.whitebg
   theme$superpose.symbol <- symb
   theme
}
trellis.par.set(theme = my.theme())
# from ?dotplot
dotplot(variety ~ yield | year, data = barley, groups = site)

It's not necessary to create a theme. You can accomplish the same just 
using trellis.par.get and trellis.par.set. The above is just my personal 
preference.

HTH,

--sundar

Lattice dotplot with symbols sized and colored

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