epimdr (version 0.6-5)

llik.pc: Function to estimate parameters for the picewise-constant catalytic model

Description

This function uses binomial likelihoods to estimate the picewise-constant FoI model from age-incidence data

Usage

llik.pc(par, age, num, denom, up)

Arguments

par

a vector with initial guesses

age

a vector with the ages

num

a vector with number infected by age

denom

a vector with number tested by age

up

a vector with upper age-bracket cut-offs

Value

The negative log-likelihood for a candidate piecewise constant catalytic model

Examples

# NOT RUN {
x=c(1,4,8,12,18,24)
para=rep(.1,length(x))
# }
# NOT RUN {
optim(par=log(para),fn=loglikpc, age=rabbit$a, num=rabbit$inf, denom=rabbit$n, up=x)
# }