[R] Adding text to strip in xYplot

From: John Poulsen <jpoulsen_at_zoo.ufl.edu>
Date: Wed, 09 Apr 2008 08:39:09 -0400


Hello again,

I have been trying to add an expression to the strips in xYplot to no avail. For example, in the code below, the text in the strips for each panel is "Anls" and "Plts". However, I would like it to add "Anls km^2" and "Plants km^2" with the exponents raised.

I tried resetting the name of my groups in the dataframe before plotting, but the dataframe only recognized the entire expression (e.g. expression(paste("Anls", km^2,sep=" ")) and not Anls km2 - which should not have surprised me.

Any ideas? Thanks for any help you can provide.

John

x1=rseq(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")

with(dat,xYplot(Cbind(ycomb, y.up, y.low)~x1|factor(grp), data=dat,type="l", method="bands", scales=list(y=list(relation="free"),

        x=list(alternating=c(1,1,1))),ylim=list(c(0,1200),c(0,10000))))



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