Allan - Nothing canned, as far as I know. For a single plot, use plot(), then points(), axis(4, ...). See the help pages for each one. Wehn plotting the second data set using points, you will need to shift and scale the vertical coordinate yourself, to the scale of the first dataset, and do the same for axis().
Here's a somewhat cooked example. data.x <- c(1:50) data.y <- exp(rnorm(50)) data.p <- rank(data.y) / 50 # percentiles plot(data.x, data.y, pch="+") temp <- range(data.y) points(data.x, temp[1] + (temp[2] - temp[1]) * data.p, pch=20) axis(side=4, at = temp[1] + (temp[2] - temp[1]) * c(0:5) / 5, labels = c(0:5) / 5) What's cooked here is that I know by construction that data.p lies in 0 to 1, therefore I don't have to do a more complicated shift and scaling to get the second data set into the vertical scale of the first. HTH - tom blackwell - u michigan medical school - ann arbor - On Thu, 3 Apr 2003, Allan McRae wrote: > I am trying to plot two data sets on one plot but with using a different y-axis > ranges for each - preferably with one shown on each side of the graph. > > Is there a function that will allow me to do this. > > Thanks > > Allan McRae ______________________________________________ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help
