loglikhd function

Negative log likelihood for a dataset of interval-censored data, given a distribution and its parameters.

loglikhd(pars, dat, dist)

Arguments

• pars: vector of the transformed (estimation scale) parameters
• dat: a dataset, as in dic.fit
• dist: a distribution, as in dic.fit

Returns

negative log-likelihood for a given dataset, parameters, and distribution.

Details

This package uses two versions of each parameter, the estimation scale, or the scale that is used for numerical optimization, and the reporting scale, or the natural scale of the parameters. For all likelihood calculations, this loglikhd function expects parameters that are on the estimation scale, i.e. have range $(-\infty, \infty)$. Specifically, this translates into all parameters for all distributions being log-transformed except for the meanlog (i.e. "par1") for the log-normal distribution.