Andreas Svensson wrote: > So, how can I constrain the abline to the relevant region, i.e stop > abline from extrapolating beyond the actual range of data. > Or should I use a function line 'lines' to do this?
One elegant way of doing this is using 'xyplot' from 'lattice' and adding a loess line with a large value of 'span' (which basically makes is equal to the ordinary least-squares regression line). Here's a simple example: library(lattice) data(iris) xyplot(Petal.Length~Petal.Width, groups=Species, type=c("p","smooth"), span=100, data=iris) -- Karl Ove Hufthammer ______________________________________________ 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