factorial {BayesDA} | R Documentation |

A factorial designed experiment from chemistry. Three experimental variables representing reactor conditions, and the response, conversion (%) from n-Heptane to acetylene.

`data(factorial)`

A data frame with 16 observations on the following 4 variables.

`temperature`

reactor temperature

`ratio`

ratio of H2 to n-heptane (mole ratio)

`contact`

Contact time (sec)

`conversion`

the response, conversion from n-heptane to acetylene

This data is used in an exercise on regression with many explanatory variables, page 413 of second edition. Original authors assume a quadratic functional form.

```
data(factorial)
summary(factorial)
# non-Bayesian analysis:
fac.mod1 <- lm(conversion ~ temperature+ratio+contact+
I(temperature*ratio)+I(temperature*contact)+
I(ratio*contact)+I(temperature^2)+I(ratio^2)+I(contact^2),
data=factorial)
summary(fac.mod1)
```

[Package *BayesDA* version 2012.04-1 Index]