archdata (version 1.2)

RBPottery: Romano-British Pottery

Description

Results of chemical analyses of 48 specimens of Romano-British pottery from 5 sites in 3 regions.

Usage

data("RBPottery")

Format

A data frame with 48 observations on the following 12 variables.

ID

Sample ID

Kiln

Kiln: Gloucester, Llanedeyrn, Caldicot, Islands Thorns, and Ashley Rails

Region

Region: Gloucester, Wales, and New Forest

Al2O3

Percentage aluminum trioxide

Fe2O3

Percentage Iron trioxide

MgO

Percentage magnesium oxide

CaO

Percentage calcium oxide

Na2O

Percentage sodium oxide

K2O

Percentage potassium oxide

TiO2

Percentage titanium dioxide

MnO

Percentage manganese oxide

BaO

Percentage barium oxide

Details

Results of chemical analyses of 48 specimens of Romano-British pottery published by Tubb, et al. (1980). The numbers are the percentage metal oxide. "Kiln" indicates at which kiln site the pottery was found. The kiln sites come from three regions (1=Gloucester, (2=Llanedeyrn, 3=Caldicot), (4=Islands Thorns, 5=Ashley Rails)). The data were scanned from Table 2.2 in Baxter (2003, p. 21) and preserve three probable typographical errors in the original publication. Those errors are the values for TiO2 in line 4 (sample GA4), for MnO in line 35 (sample C13), and for K2O in line 36 (sample C14). Versions of these data are also available as Pottery in package car, pottery in package HSAUR, and Pottery2 in package heplots.

References

Carlson, David L. 2017. Quantitative Methods in Archaeology Using R. Cambridge University Press, pp 247-255, 335-342.

Examples

# NOT RUN {
data(RBPottery)
print(aggregate(RBPottery[, -c(1:3)], list(Region=RBPottery$Region), mean), digits=2)
plot(Na2O~CaO, RBPottery, pch=as.numeric(Region)-1)
legend("topright", levels(RBPottery$Region), title="Region", pch=0:2)
# }