Yes, contourplot() takes irregular spaced values, but you need a regular grid to project the data on to.
grid <- expand.grid(x=x,y=y); contourplot(z~x*y,grid,cuts=50); This gives me a plot with little coloured areas around my datapoints only. A better way for me was to library(akima); data.interp <- interp(x,y,z); image(data.interp); #or contour(data.interp); where interp() leaves you with multiple options of interpolation (linear, spline, ...). For further reading I recommend: https://stat.ethz.ch/pipermail/r-help/2005-October/080853.html https://stat.ethz.ch/pipermail/r-help/2003-December/043897.html https://stat.ethz.ch/pipermail/r-sig-geo/2005-October/000609.html cheers, andre S Ellison wrote: > Doesn't the lattice package's contourplot take arbitrary x and y? > > library(lattice) > ?contourplot ______________________________________________ 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.
