With R version 2.8.0, I am using the following function to plot loess
lines in each panel of the xyplot:
xyplot(Z~year|labels,group=as.factor(river),xlab="Year",ylab="Age-based
Z",
data=data1,scales="free",ylim=c(0,4),xlim=c(1960,2010),
par.settings = list(superpose.symbol = list(pch =
c(1,2,3,4,5,16,10,6,87,83),cex=0.9,
col="black")),
panel=function (x,y,...){
panel.loess(x,y,...,span=0.75,degree=1,lwd=1.5,col="black")
panel.superpose (x,y,...)
},
auto.key = list(points = T,title="River",space="right",cex=0.8),
main="Blueback",as.table=T,layout=c(2,2)
)
There are only three data points for one panel, so an error from the
loess function appears in the plot and the point are not graphed. Would
anyone know how I could stop the loess function from being applied to
data for a particular panel, but still allow to points to be plotted?
Thanks for your help.
Gary Nelson
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