Tip 1: This sort of thing is done with panel functions. ?xyplot and ?panel.xyplot is where to start.
Tip 2: grid functions are generally not necessary, as translations of the common ones are part of lattice. See ?panel.points Tip 3: Deepayan's book provides a gentler explanation of these matters with more examples than R's man pages. Tip 4: Depending on your needs and predilections, you may prefer to use ggplot2. Bert Gunter Genentech Nonclinical Biostatistics -----Original Message----- From: r-help-boun...@r-project.org [mailto:r-help-boun...@r-project.org] On Behalf Of Erik Iverson Sent: Wednesday, March 31, 2010 12:54 PM To: Czerminski, Ryszard Cc: R-help@r-project.org Subject: Re: [R] lattice: how to add points to the plot generated bylevelplot()? Czerminski, Ryszard wrote: > I am using levelplot() function from pkg:lattice and I want to add some > points > to the plot generated by levelplot() It's best to include a small example of what you have done so far, and what you want to further do. Actual R code with a small sample dataset is great. > similarly as in basic R graphic sequence: plot(...); points(...), > but it does not work. > > I was reading documentation for lattice, but so far without much > success. > > I would very much appreciate some tips. Most base graphics functions like point have a grid equivalent. In this case, use grid.points. levelplot(runif(100)~runif(100)*runif(100), panel = function(...) { panel.levelplot(...) grid.points(.1, .1, pch = 2) }) I found the Lattice book and the "R Graphics" book invaluable, both are worth getting. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.