search for: estcontplot

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2006 May 11
1
Conditional contour plots for estimated density functions using Lattice
...he contourplot function in the 'lattice' package only accepts data that are on the form 'z ~ x * y', not on the form 'x,y' or 'y~x'; otherwise I could probably have used the panel function to do the needed conversion. Here is my current, not very elegant, solution: estcontplot=function(x, y, grp, ...) { cest=matrix( nrow=0, ncol=4 ) for( i in levels(grp) ) { cest.gr=kde2d( x[grp==i], y[grp==i] ) cest.gr.lat=con2tr(cest.gr) cest.gr.lat=cbind(cest.gr.lat, i) cest=rbind(cest, cest.gr.lat) } contourplot( z ~ x * y | i, data=cest,...