R: Hell Creek Dinosaur Data

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)

[Package MCPAN version 1.1-21 Index]