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.
Level
Lower
Middle
Upper
, specifiyng the stratigraphic levelsCr
Ha
Hy
Pa
Ty
Or
Sa
Dr
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)