For anyone who's looked at my previously posted problem I have managed to solve the missing graph title by removing the main="Graph Title" call from my plot definition and adding a line defining the graph title as a "title" call.
i.e. from >plot(Day, Ym1Imp, ylim=c(0,100), type="b", bty="l", main="Ym1 Expression", cex=1.3, xaxt="n", yaxt="n") #plot implant data to >plot(Day, Ym1Imp, ylim=c(0,100), type="b", bty="l", cex=1.3, xaxt="n", yaxt="n") #plot implant data >title(main="Ym1 Expression")# add title which for some reason works. Still have the missing abscissa value though :-( Iain ______________________________________________ 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