Dear List members,
its me again, fighting with lattice graphics. I am trying to plot a world map,
add some points on different locations with different colors and add a legend,
but did not succeed yet with the legend. Here is my code:
library(fields)
# Data for demonstration
data_x = c(0,50,60)
data_y = c(0,0,0)
cols = c(1,2,3)
data(world.dat)
#print map
all=xyplot(world.dat$y ~ world.dat$x,
type=c('l'),col="black",xlab="",ylab="",
ylim=c(-55,80),xlim=c(-170,175),pch=20,cex=0.2,
auto.key = list(x=0,y=0,text=c('test1','test2','test3')))
print(all,position=c(0,0,1,.7),more=T)
#add points
trellis.focus(highlight=FALSE)
lpoints(data_x,data_y,pch=20,col=cols)
update(all,auto.key = list(x=0,y=0,text=c('test1','test2','test3')))
The plots are produced correctly, but the legend is still missing. Could anyone
give me some hints?
There is probably a much more elegant way how to combine the two plots but i
did not manage to understand the usage of these different panel functions.
There is most probably no way around the Trellis book, but I could not yet buy
it....
Thanks for your help
Jannis
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