Vdgraph: This package creates variance dispersion graphs and fraction of
design space plots for response surface designs
This package calls a modification of the published FORTRAN code for producing variance dispersion graphs. For more details on variance dispersion graphs see "A Computer Program for Generating Variance Dispersion Graphs" by G. Vining, Journal of Quality Technology, Vol. 25 No. 1 January 1993.
||John Lawson <lawson at byu.edu>