
This data frame is taken verbatim from the (now archived) Vdgraph package. See that package for the original reference.
SCDDL5
a data frame of 23 runs in five variables.
Lawson J, Vining G (2014). Vdgraph: Variance dispersion graphs and Fraction of design space plots for response surface designs. R package version 2.2-2, https://CRAN.R-project.org/package=Vdgraph.