| HCD {MCPAN} | R Documentation |
Hell Creek Dinosaur Data
Description
Counts of dinosaur families found in three stratigraphic levels of the Cretaceous period in the Hell Creek formation in North Dakota. The eight families are the Ceratopsidae (Ce), Hadrosauridae (Ha), Hypsilophodontidae (Hy), Pachycephalosauridae (Pa), Tyrannosauridae (Ty), Ornithomimidae (Or), Sauronithoididae (Sa) and Dromiaeosauridae (Dr).
Usage
data(HCD)Format
A data frame with 3 observations on the following 9 variables.
- Level
a factor with levels Lower, Middle, Upper, specifiyng the stratigraphic levels
- Cr
a numeric vector, counts of the Ceratopsidae
- Ha
a numeric vector, counts of the Hadrosauridae
- Hy
a numeric vector, counts of the Hypsilophodontidae
- Pa
a numeric vector, counts of the Pachycephalosauridae
- Ty
a numeric vector, counts of the Tyrannosauridae
- Or
a numeric vector, counts of the Ornithomimidae
- Sa
a numeric vector, counts of the Sauronithoididae
- Dr
a numeric vector, counts of the Dromiaeosauridae
Source
Table 1 in: Rogers, JA and Hsu, JC (2001): Multiple Comparisons of Biodiversity. Biometrical Journal 43, 617-625.
References
Sheehan, P.M., et al. (1991): Sudden extinction of the Dinosaurs: Latest Cretaceous, Upper Great Plains, U.S.A. Science 254, 835-839.
Examples
data(HCD)
str(HCD)
HCD
mat<-as.matrix(HCD[,-c(1)])
rownames(mat)<-HCD$Level
mosaicplot(mat, las=1)
estSimpsonf(X=HCD[,-c(1)], f=HCD$Level)
estShannonf(X=HCD[,-c(1)], f=HCD$Level)