Message-ID: <22117545.post@talk.nabble.com>
Date: 2009-02-20T09:34:02Z
From: chris20
Subject: adding a reference line to an xyplot
Hi,
I want to add a dashed vertical line to a number of xyplots.
Here is a simple script of the type of plot I have but then I want to add a
reference line to 1995 on each of the panels. I have tried panel.abline and
other suggestions on the forum but can't get it to work.
plot<-rep(letters[1:3],each=10)
year<-rep(1991:2000,times=3)
matter<-rep(seq(2,6.5,0.5),times=3)
xyplot(matter~year|plot,type="l")
Cheers,
Chris
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