Dear all, Just to inform that I have solved my problem in a very elegant way, thanks to the layer approach given by package latticeExtra.
After loading my grids like before: x<-1:10 y<-1:10 grid1<-expand.grid(x=x,y=y) grid2<-expand.grid(x=x,y=y) z1<-grid1$x^2 + grid1$y^2 z2<-2*grid2$x^2 - grid2$y^2 grid1$z<-z1 grid2$z<-z2 I just need to do: levelplot(z ~ x*y,grid2) + as.layer(contourplot(z ~ x*y,grid1)); The result is a beautiful plot with a contourplot over a levelplot. There are some examples of overlay of trellis plots in the manual of latticeExtra: http://latticeextra.r-forge.r-project.org/ Thank you for your attention, Best, Charles On Sat, Aug 2, 2014 at 4:01 PM, Charles Novaes de Santana < charles.sant...@gmail.com> wrote: > Dear all, > > Does anyone know a way to overlay a contourplot and a levelplot of > different datasets, both datasets with the same dimension? > > Let's say I have 2 10x10 grids, like those below: > > library(lattice) > > x<-1:10 > y<-1:10 > grid1<-expand.grid(x=x,y=y) > grid2<-expand.grid(x=x,y=y) > z1<-grid1$x^2 + grid1$y^2 > z2<-2*grid2$x^2 - grid2$y^2 > grid1$z<-z1 > grid2$z<-z2 > > I would like to plot z1 and z2 in the same plot: z1 as a contourline and > z2 as a levelplot. I tried to do this in two ways, without success: > > plot.new(); > contourplot(z ~ x*y,grid1) > par(new=T) > levelplot(z ~ x*y,grid2) > > and > > levelplot(z ~ x*y,grid1,region=FALSE,contour=TRUE) > par(new=T) > levelplot(z ~ x*y,grid2,region=TRUE,contour=FALSE) > > Any clue? > > Thank you very much for your time and any help! > > Charles > > -- > Um axé! :) > > -- > Charles Novaes de Santana, PhD > http://www.imedea.uib-csic.es/~charles > -- Um axé! :) -- Charles Novaes de Santana, PhD http://www.imedea.uib-csic.es/~charles [[alternative HTML version deleted]]
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