Hello,
I have a dataset consisting of four variables: species (factor, five
levels), C3C4 (factor, two levels), and numeric variables PAR and LRU.
I wish to produce a scatter plot of PAR vs LRU where (1) each species
has a unique symbol and color (2) there is an overlaid loess line that
is calculated for each C3C4 level. The following code produces a nice
plot where each species has its own loess curve, but I'm struggling for
the syntax to produce a single loess curve for all the points in each of
the two plots:
xy <- xyplot(LRU~PAR|C3C4, data=light_data, groups=species,
panel=panel.superpose,
auto.key=TRUE,
col.line=pal,
par.settings=mytheme,
panel.groups=function(x, y, ...){
panel.xyplot(x, y, ...)
panel.loess(x, y, ...)})
Any help much appreciated. Thanks!
Tim
--
Timothy W. Hilton
Assistant Project Scientist
Sierra Nevada Research Institute
University of California, Merced
[email protected]
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