Dear R users,

If I manage to sort out this graph, it is certainly a candidate for the new R graph gallery (http://addictedtor.free.fr/graphiques/displayGallery.php)!

I created the following lattice graph:

library(lattice)
tmp <- expand.grid(geology = c("Sand","Clay","Silt","Rock"),
species = c("ArisDiff","BracSera","CynDact","ElioMuti","EragCurS","EragPseu"),
dist = seq(1,9,1) )
tmp$height <- rnorm(216)
sps <- trellis.par.get("superpose.symbol")
sps$pch <- 1:6
trellis.par.set("superpose.symbol", sps)
xyplot( height ~ dist | geology, data = tmp,
groups = species, type = "b", cex = 1.2,
layout = c(2,2),
lines = list(col="grey"),
key = list(columns = 2, type = "b", cex = 1.2,
text = list(paste(unique(tmp$species))),
points = Rows(sps, 1:6)
)
)


However, for once, the R defaults are not to my liking. I plot the graph to postscript and the result is less then optimal.

I would like to plot the point symbols in black and white, both in the graphs and the key. I would like the lines to be a single style (grey or a light dash) and preferably the lines do not go through the symbols (like figure 4.11 in the MASS book).

I have tried many, many options, but results varied from wrong symbols to wrong things plotted. Splitting the lines and points over different panels seems the way, but I can not make it work.

Your help is much appreciated! This graph and the resulting black and white graph will be posted on the R graph gallery.

Thanks,

Sander.




-- -------------------------------------------- Dr. Sander P. Oom Animal, Plant and Environmental Sciences, University of the Witwatersrand Private Bag 3, Wits 2050, South Africa Tel (work) +27 (0)11 717 64 04 Tel (home) +27 (0)18 297 44 51 Fax +27 (0)18 299 24 64 Email [EMAIL PROTECTED] Web www.oomvanlieshout.net/sander

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