Hello,
I am using xYplot to plot lines with confidence bands (see test
example below). I would like to add a single point with
confidence bars to each graph (coordinates of the points below:
px, py, pxlow, etc...). I tried playing with
panel=panel.superpose, but failed to get it to work. Any ideas on
how to add these points to the graphs?
Thanks for your help,
John
## Test example
x1=seq(1,30,0.5)
y1=x1^2
y2=10*(x1^2)
ycomb=c(y1,y2)
y.up=ycomb+0.1*ycomb
y.low=ycomb-0.1*ycomb
grp=rep(c("Anls","Plts"),each=length(x1))
dat=as.data.frame(cbind(ycomb, y.up, y.low,
rep(x1,2)),stringsAsFactors=F)
colnames(dat)=c("ycomb","y.up","y.low","x1")
py=c(200,2000); pylow=c(190,1900); pyhi=c(210,2100)
px=c(0,0); pxlow=c(0,0); pxhi=c(0,0)
with(dat,xYplot(Cbind(ycomb, y.up, y.low)~x1|factor(grp),
data=dat,type="l", method="filled bands", col.fill="light
grey",
scales=list(y=list(relation="free"),x=list(alternating=c(1,1,1))),
ylim=list(c(0,1200),c(0,10000)),
strip=strip.custom(factor.levels=c(expression("Anls
km"^2),expression("Plants km"^2)))))
-------------------------------
John Poulsen
223 Bartram Hall PO Box 118525
University of Florida
Gainesville, FL 32611-8525
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