[R] Legends in xyplot

[Ravi Varadhan]

Hi Uwe,

I am aware of the "legend" option in xyplot, but I can't figure out how to
make it work.  In particular, I do not understand how to use "legend" along
with the "key" argument. For my example, I would like to have a legend box
inside the plotting frame to indicate the 3 different smoothed curves.  
Can someone give me a simple example or show how to do this for my example?

Thanks very much,
Ravi.

> -----Original Message-----
> From: Uwe Ligges [mailto:ligges at statistik.uni-dortmund.de]
> Sent: Tuesday, January 17, 2006 3:08 AM
> To: Ravi Varadhan
> Cc: r-help at stat.math.ethz.ch
> Subject: Re: [R] Legends in xyplot
> 
> See ?xyplot and its argument "legend".
> 
> Uwe Ligges
> 
> 
> 
> 
> Ravi Varadhan wrote:
> 
> > Hi,
> >
> >
> >
> > How can I add legends in the "xyplot" function, in the "lattice"
> library?
> > Here is a simulation example:
> >
> >
> >
> > x <- runif(90)
> >
> > z <- sample(1:3, 90, rep=T)
> >
> > y <- rnorm(90, mean = x^2 + z, sd=1)
> >
> >
> >
> > library(lattice)
> >
> > trellis.par.set(col.whitebg())
> >
> > xyplot(y ~x, groups=as.factor(z), type = c('p', 'smooth'), span = .67)
> >
> >
> >
> > Thanks in advance,
> >
> > Ravi.
> >
> >
> >
> >
> > 	[[alternative HTML version deleted]]
> >
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