Dear R users, I would like to reverse the axes on some xy plots (for example to set the origin at the top left rather than the bottom left). I had planned to use something of the following form:
plot(y=y<-c(20,4,5,6),x=x<-c(10,20,30,40),ylim=rev(range(y))) ie reversing ylim to reverse the y axis. This works fine however I also want to use the parameter asp=1 to ensure that equal distances in the x or y direction are plotted as such on the screen. However the simple example I showed above now fails: > plot(y=y<-c(20,4,5,6),x=x<-c(10,20,30,40),ylim=rev(range(y)),asp=1) The actual ylim used is considerably less than it should be, so no points appear on the plot. Can anyone suggest a simple remedy? Many thanks, Greg Jefferis. PS I would guess that the origin of this behaviour is that plot.window expects xlim (and ylim) to be in the order xmin,xmax (or ymin,ymax) when it sets about redefining xlim and ylim if asp!=NA. If that suggestion is correct, I'm not quite sure why the restriction is necessary. -- Gregory Jefferis, PhD and: Research Fellow Department of Zoology St John's College Downing Street Cambridge Cambridge, CB2 3EJ CB2 1TP ______________________________________________ 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