[R] trellis plot

[Brad Buchsbaum]

Hi,

I'd like to plot 4 groups of data using xyplot and panel.superpose so
that the points are overlayed on a single plot.  For each group of data
I'd also like a loess smoothed function (using panel.loess).  I have
tried the following:

xyplot(series ~ time | gr, data=etable,
         panel = function(x,y, ...) {
           panel.superpose(x,y, ...)
           panel.loess(x,y,span=.15)

           }
)

However, this gives me only a single loess curve (collapsed across
groups) whereas I would like one curve for each group (just as I get one
color for each set of points from the panel.superpose).

Is there a way to accomplish this?


thanks,

Brad Buchsbaum

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