VGAM (version 0.9-2)

Perom: Captures of Peromyscus maniculatus, also known as deer mice.

Description

Captures of Peromyscus maniculatus collected at East Stuart Gulch, Colorado, USA.

Usage

data(Perom)
  data(deermice)

format

The format is: chr "Perom"

Details

Peromyscus maniculatus is a rodent native to North America. The deer mouse is small in size, only about 8 to 10 cm long, not counting the length of the tail.

The columns of this data frame represent the sex (m or f), the ages (y: young, sa: semi-adult, a: adult), the weights in grams, and the capture histories of 38 individuals over 6 trapping occasions (1: captured, 0: not captured).

The data set was collected by V. Reid and distributed with the CAPTURE program of Otis et al. (1978).

Perom has 36 deermice; deermice has 38 deermice. In deermice the two semi-adults have been classified as adults.

References

Huggins, R. M. (1991) Some practical aspects of a conditional likelihood approach to capture experiments. Biometrics, 47, 725--732.

Otis, D. L. et al. (1978) Statistical inference from capture data on closed animal populations, Wildlife Monographs, 62, 3--135.

See Also

posbernoulli.b, posbernoulli.t.

Examples

head(Perom)
fit1 <- vglm(cbind(y1, y2, y3, y4, y5, y6) ~ sex + age,
             posbernoulli.t(parallel.t = TRUE), data = Perom, trace = TRUE)
coef(fit1)
coef(fit1, matrix = TRUE)