rsm (version 2.06)

codata: Automobile emissions data

Description

This is a replicated 3^2 experiment reported in Box, Hunter, and Hunter (2005), Table 10.17.

Usage

codata

source

Box, GEP, Hunter, JS, and Hunter, WG (2005) Statistics for Experimenters (2nd ed), Wiley.

Details

This example, when fitted with a second-order response surface, is an example of a rising ridge. The dataset is duscussed again one chapter later in the source text; Figure 11.17 of BH^2 suggests the coding formulas used in the example below.

Examples

# Create a coded dataset based on info in BH^2 Fig 11.17
CO <- as.coded.data(codata,  x1 ~ (Ethanol - 0.2)/0.1,  x2 ~ A.F.ratio - 15)
names(CO)[3] <- "CO.conc"