On Tue, 2010-08-31 at 17:18 +0100, Lathouri, Maria wrote: > Dear all, > > I want to make a plot where I can specify the range of y axis. I am using the > interaction.plot command and because the values of y axis are from 2 to 500, > I am using a logarithmic scale. > > >interaction.plot(speclong$Date,speclong$time2,speclong$outcome,xaxt="n",type="l",pch=20,xlab="", > > log="y", ylab="Concentration (ug/L)",trace.label="",col=rainbow(7)) > > > > The plot itself gives me a y scale displaying ticks at 2, 5, 10, 20, 100, > 200, 500. I would like to get a y scale where it would display ticks at every > 4 marks, at 2, 20, 100 and 500. > > > > I tried ylim=c(2,20,100,500) but nothing happened. Actually I got an error.
ylim needs to be the extreme limits of the axis, i.e. a vector of length 2. Suppress axis plotting and then draw your own: interaction.plot(...., axes = FALSE) axis(2, at = c(2,20,100,500)) E.g., using the example in ?interaction.plot > with(ToothGrowth, interaction.plot(dose, supp, len, fixed=TRUE, axes = FALSE)) > axis(2, at = c(10, 20)) > axis(1) > box() Does that help? G > > > > Could you help me? > > > > Thank you. > > > > Maria > > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. -- %~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~% Dr. Gavin Simpson [t] +44 (0)20 7679 0522 ECRC, UCL Geography, [f] +44 (0)20 7679 0565 Pearson Building, [e] gavin.simpsonATNOSPAMucl.ac.uk Gower Street, London [w] http://www.ucl.ac.uk/~ucfagls/ UK. WC1E 6BT. [w] http://www.freshwaters.org.uk %~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~% ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.