Bernard L. Dillard wrote: > 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?
For just 2 columns, a contour plot does not make much sense, I guess. I think an image() makes much more sense in this case. Your z matrix consists of the entries of the data.frame/matrix given above, the x and y vectors are the column and row numbers. Uwe Ligges > Thanks. > ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
