What you need to do is to specify that you don't want labels on the second plot:
## (2) Does plot points where (x-axis) they should be xlim <- range(x1) plot(x1, y1, type="l", xlim=xlim) par(new=TRUE) plot(x2, y2, type="p", xlim=xlim, xlab='', ylab='', axes=FALSE) axis(4) On Wed, Oct 7, 2009 at 4:29 AM, Rainer M Krug <r.m.k...@gmail.com> wrote: > Hi > > is there an alternative to par(new), for ading data to a plot for a > different y-axis? > My problem with par(new=TRUE) is, that it re-defines all axis and labels (as > in example 1) and one has to use xlim=... to fix the x-axis. > I am looking for something, which simply resets the y-axis, so that a new > plot() (or points()/lines()) keeps the x-axis, but re-defines the y-axis. > > Is there something available? I could re-scale the y-data to fit the > existing y-axis, but that would mean to define all the labels and tickmarks > for axis 4 manually. > > HEre is an example about what I mean: > > x1 <- 1:10 > y1 <- runif(10) > x2 <- 1:11 > y2 <- c(y1*100, 0) > > ## (1) Does not plot points where (x-axis) they should be > plot(x1, y1, type="l") > par(new=TRUE) > plot(x2, y2, type="p") > axis(4) > > ## (2) Does plot points where (x-axis) they should be > xlim <- range(x1) > plot(x1, y1, type="l", xlim=xlim) > par(new=TRUE) > plot(x2, y2, type="p", xlim=xlim) > axis(4) > > Cheers, > > > Rainer > -- > Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation Biology, > UCT), Dipl. Phys. (Germany) > > Centre of Excellence for Invasion Biology > Natural Sciences Building > Office Suite 2039 > Stellenbosch University > Main Campus, Merriman Avenue > Stellenbosch > South Africa > > Cell: +27 - (0)83 9479 042 > Fax: +27 - (0)86 516 2782 > Fax: +49 - (0)721 151 334 888 > email: rai...@krugs.de > > Skype: RMkrug > Google: r.m.k...@gmail.com > > [[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. > -- Jim Holtman Cincinnati, OH +1 513 646 9390 What is the problem that you are trying to solve? ______________________________________________ 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.