Thanks for the quick response. Just to make sure I understand, let me explain in a bit more detail what I am trying to do.
I have created a levelplot (with contour lines and colored regions), and what I am trying to figure out now is how to add a series of horizontal lines across the levelplot and also assign values or labels to the lines on the alternative y-axis. Would I do this with the route you suggest below?
Thanks so much for the help,
Jeff
At 06:51 PM 2/24/2004 -0600, you wrote:
On Tuesday 24 February 2004 18:03, Jeff Jorgensen wrote: > R folks, > > I can't seem to find the instructions in the help files for the lattice > package that explain how to add lines, such as with lines() or ?, to a > levelplot. I'd be grateful if someone could point me in the proper > direction.
The general rule for all lattice functions is to write your own panel function. For example,
data(volcano) levelplot(volcano, panel = function(...) { panel.levelplot(...) panel.abline(c(0,1)) })
lines() will not work for lattice, but you can use llines() instead.
Of course, for anything more useful than this example, your panel function should make use of the data that's passed to the panel function. Exactly what would be passed depends on the function in question. For levelplot, the best place to look will be panel.levelplot, and similarly for other functions.
Hth,
Deepayan
______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
