Vdgraph: this function makes a Variance Dispersion Graph of a response surface design
Description
This function calls the function Vardsgr which uses Vining's (1993) fortran
code to get the coordinates of a variance dispersion graph, and then makes
the plot.
Usage
Vdgraph(des)
Value
vdgpl
vdgpl
This is a graph containing the Variance Dispersion Graph
Arguments
des
des is a matrix or a data frame containing a response surface design in coded or uncoded units.
There should be one column for each factor in the design, and one row for each run in the design.
The maximum number of rows allowed is 99, and the maximum number of columns is 7.
1. Vining, G. "A Computer Program for Generating Variance Dispersion Graphs"
Journal of Quality Technology, Vol 25, No. 1, pp. 45-58, 1993.
2. Vining, G. "Corrigenda" Journal of Quality Technology, Vol 25, No. 4,
pp 333-335. 1993.