VGAM (version 0.9-3)

prinia: Yellow-bellied Prinia

Description

A data frame with yellow-bellied Prinia.

Usage

data(prinia)

source

Thanks to Paul Yip for permission to make this data available.

Hwang, W.-H. and Huggins, R. M. (2007) Application of semiparametric regression models in the analysis of capture--recapture experiments. Australian and New Zealand Journal of Statistics 49, 191--202.

Details

The yellow-bellied Prinia Prinia flaviventris is a common bird species located in Southeast Asia. A capture--recapture experiment was conducted at the Mai Po Nature Reserve in Hong Kong during 1991, where captured individuals had their wing lengths measured and fat index recorded. A total of 19 weekly capture occasions were considered, where 151 distinct birds were captured.

More generally, the prinias are a genus of small insectivorous birds, and are sometimes referred to as wren-warblers. They are a little-known group of the tropical and subtropical Old World, the roughly 30 species being divided fairly equally between Africa and Asia.

Examples

head(prinia)
summary(prinia)
rowSums(prinia[, c("cap", "noncap")])  # 19s

#  Fit a positive-binomial distribution (M.h) to the data:
fit1 <- vglm(cbind(cap, noncap) ~ length + fat, posbinomial, data = prinia)

#  Fit another positive-binomial distribution (M.h) to the data:
#  The response input is suitable for posbernoulli.*-type functions.
fit2 <- vglm(cbind( y1,  y2,  y3,  y4,  y5, y6,  y7,  y8,  y9,
                   y10, y11, y12, y13, y14, y15, y16, y17, y18, y19) ~
             length + fat, posbernoulli.b(drop.b = FALSE ~ 0), data = prinia)