hyperdirichlet (version 1.5-1)

fitz: Fitzmaurice

Description

Hyperdirichlet distribution corresponding to a dataset of Fitzmaurice et al

Usage

fitz(dat , include.missing=TRUE , validated=NULL)

Arguments

dat

A vector corresponding to either male or female data

include.missing

Boolean, with default TRUE meaning to return the likelihood function for the data including the missing cases, and FALSE meaning to include only the data corresponding to complete cases

validated

Boolean, with TRUE meaning to omit the checks (OK if all elements of dat are non-negative) and FALSE meaning to check them all (time-consuming)

Value

Returns a hyperdirichlet distribution (without normalizing factor) corresponding to the observations, either male or female, made by Fitzmaurice et al.

Details

Fitzmaurice considered childhood obesity. See the reference for further details.

References

G. M. Fitzmaurice, N. M. Laird, and S. R. Lipsitz 1994. “Analysing incomplete longitudinal binary responses: a likelihood-based approach”. Biometrics, volume 50, pp601-612.

Examples

  boys  <- c(20,7,9,8, 8, 8,15,150,13,3,2,42,3,1, 6,16,11,1,3,38,14,55,4,33,7,45)
  girls <- c(21,6,6,2,19,13,14,154, 8,1,4,47,4,0,16, 3,11,1,3,25,13,39,5,23,7,47)

  male <- fitz(boys)
  maximum_likelihood(male)