logLikelihood.4p {vitality}

Log likelihood of 2-process 4-parameter model

Description

Gives the log likelihood of 2-process 6 parameter vitality model.

Usage

  logLikelihood.4p(par, xx1, xx2, NNi)

Arguments

par

vector of parameter(r, s, lambda, beta)

xx1

xx1 vector

xx2

xx2 vector

NNi

survival fractions

Details

For use in vitality.4p.

Value

log likelihood

See Also

logLikelihood.6p