R help - Oct 2003 - persp or scatterplot3d?

Hello,

I have three x-y plots whose interesting data occurs at the same time. When I
place them in the same plot, they tend to obscure each other. I was hoping to
use persp or scatterplot3d to plot them 3-dimensionally, so that the plot is
visually useful. My data is simple:

x, for all three data sets, is a set of 885 ISOdates, where x <- x0 + seq(1,
885).

y is the value of "io", "sys", or "usr" that
occurs at time "x". These values
range between 0 - 8. A simple 3-d line plot of each would suffice. Would
scatterplot3d be able to do this, or must I adapt my data to use persp? Any
comments would be helpful. I have data sets and snapshots of the plots in
question if desired.

Thanks for your help,

John

heimdal at aracnet.com
	[has three x-y plots with the same horizontal axis and similar
	 vertical axes.  He wants to see the three variables together,
	 but if the graphs are plotted in the same rectangle, they
	 obscure each other.  He wants to make a "visually useful" plot.]

Why not just do
    oldpar <- par()
    par(mfrow=c(3,1))
    plot(x, y1)
    plot(x, y2)
    plot(x, y3)
    par(oldpar)


	y is the value of "io", "sys", or "usr" that
occurs at time "x".

This sounds like the amount of time being spent by a computer on
various activities.  A plot that might be revealing, although it
would lose the time dimension, would be a ternary plot (see
help("ternaryplot", package="vcd")); the time dimension
could be
partly recovered by chopping the times into equal-length subintervals
and plotting a separate ternary diagram for each, in a matrix of
ternary diagrams.