HCD {MCPAN} | R Documentation |
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).
data(HCD)
A data frame with 3 observations on the following 9 variables.
Table 1 in: Rogers, JA and Hsu, JC (2001): Multiple Comparisons of Biodiversity. Biometrical Journal 43, 617-625.
Sheehan, P.M., et al. (1991): Sudden extinction of the Dinosaurs: Latest Cretaceous, Upper Great Plains, U.S.A. Science 254, 835-839.
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)