Re: about how to plot R chart

[Dave Kaufman]

Please, we need a little more information if any of us are to help
out.  Do you have 20 sets of data or 20 points?  You want to pick 5
points at random to determine the range?  Is the data vs. time, X vs.
Y or just sequential?  How is the data collected (1D array, 2D array,
cluster, string, numerics, etc.)?