search for: mde_speakerration_by_lengthen

...ll=c("red","green")),xlab="length difference > (log ms)",ylab="speaker") > curve(0*x,add=T) then the plot is what I want, but note that I had to use y=0 to get the line put at 0.5!!!! so it is already suspicious. But then: > dev.print(pdf,"mde_speakerration_by_lengthening.pdf") Error in dev.copy(device = function (file = ifelse(onefile, "Rplots.pdf", : invalid graphics state Can anyone suggest a remedy? Viktor