Hi, I am trying to put on one plot two different logarithmic scales, using the bottom and top X-axes. Below there is an example of what I am trying to achieve, using axTicks() -- and fails.
I already spent few hours on that, and cannot figure out from ?par and ?axTicks what I am doing wrong. Example follows: ############################################################ #### Data x <- c(1.1*1:4, 25*1:5) / 50e+03 y <- c(0.15*1:4, 0.6 + 0.05*1:5) #### Configure plot old.par <- par(no.readonly=TRUE) xlim <- range(xlim) ylim <- c(0, 1) #### Plot ## For production I will plot several data sets, so I first ## initialize window, and then use lines(). plot.new() plot.window(xlim=xlim, ylim=ylim, log="x") lines(x, y) #### Plot axes axis(1) ## Ticks for upper X-axis with a new scale: xlim*4e06 cat("top.ticks:\n", top.ticks <- axTicks(3, usr=xlim*4e06), "\n") ## Here I thought to put something like axis(3, at=top.ticks). ## Probably will need to rescale 'top.ticks' according to ## lower X-axis? axis(2) ### Restore par(old.par) ############################################################ Thanks in advance for any comments/suggestions. Itay ----------------------------------------------------------------- [EMAIL PROTECTED] Fred Hutchinson Cancer Research Center ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html