On Fri, 2007-03-23 at 12:40 +0000, [EMAIL PROTECTED] wrote: > Sorry if this is an obvious question but I have not been able to find the > answer. > I wish to plot 3 lines on the same plot. However, whichever one I plot > first, the axis does not have a big enough range for the other two to be > shown in the plot (they get cut off at the top and the bottom). Is there a > way to change the range of the y-axis when adding a new line to the plot? > > Thank you, > > Alex
Use the ylim parameter in plot(): x <- 1:100 y1 <- sort(runif(100)) y2 <- y1 * 1.2 y3 <- y2 * rnorm(100) plot(x, y1, type = "n", ylim = range(y1, y2, y3)) lines(x, y1, col = "red") lines(x, y2, col = "blue") lines(x, y3, col = "green") An alternative is matplot: matplot(x, cbind(y1,y2,y3), col = c("red", "blue", "green"), type = "l", lty = "solid") or matplot(x, cbind(y1,y2,y3), type = "n") matlines(x, cbind(y1,y2,y3), col = c("red", "blue", "green"), lty = "solid") HTH G -- %~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~% 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@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 and provide commented, minimal, self-contained, reproducible code.