I guess what you want is contours of the density over the x-y plane. There are a few choices that I know of:
kde2d in MASS (part of the `VR' bundle) bkde2d in KernSmooth sm.density in sm locfit in locfit Andy > From: Bernard L. Dillard > > Hello all. > > I'm confused a bit about contour plots. After reading the help at > "?contour", it seems as though the contour plot is for 3D > plots (x,y, and > z). My data is in the form of grid coordinates (x,y), and I > want to see a > contour plot of the data so that I can tell where most > observations lie. > My question is simple but still evasive. > > Say my data is called places. One column is X and another is Y. Or, > > places$X places$Y > > Coordinate 1 32 50 > Coordinate 2 15 33 > Coordinate 3 28 20 > etc > > How do I get R to do the contour plot with no third "z" coordinate? > > Thanks. > > -- > Do all you can with what you have in the time you have in the > place you are! > > -Nkosi Johnson, 12-year old African hero > > ______________________________________________ > R-help@stat.math.ethz.ch mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! > http://www.R-project.org/posting-guide.html > > > ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html