The data were collected by J.M. Rudrauf on Alsacian castles whose building period is unknown.
On each castle, he measured 4 structural parameters on a sample of building stones.
Usage
data(castles.nondated)
Arguments
Format
castles.nondated is a list of two data frames:
castles.nondated$stones:
this first data frame has 1280 cases (rows) and 5 variables (columns) that are named
height, width, edging, boss (numeric) and castle (factor).
castles.nondated$periods:
this second data frame has 67 cases and 2 variables named castle and period; the column castle corresponds to the levels of the factor castle of the first data frame; the column period is a factor indicating NA as the building period is unknown.
Notice that the data frames corresponding to the castles whose building period is known are those in castles.dated.