llcont: Individual Log-Likelihoods

In nonnest2: Tests of Non-Nested Models

Individual Log-Likelihoods

Description

Obtain log-likelihood values associated with individual observations, evaluated at the ML estimates.

Usage

llcont(x, ...)

Arguments

x	a model object
...	arguments passed to specific methods

Details

This is a S3 generic function. Currently, the method is defined for lm, glm, glm.nb, clm, hurdle, zeroinfl, mlogit, nls, polr, rlm, lavaan, vglm, mirt, and OpenMx objects.

Value

An object of class numeric containing individuals' contributions to the log-likelihood. The sum of these contributions equals the model log-likelihood.

Author(s)

Ed Merkle, Dongjun You, Lennart Schneider, and Mauricio Garnier-Villarreal

Examples

## Fit gamma glm, check that sum of llcont() equals
## the model loglikelihood:
clotting <- data.frame(u = c(5,10,15,20,30,40,60,80,100),
                       lot1 = c(118,58,42,35,27,25,21,19,18),
                       lot2 = c(69,35,26,21,18,16,13,12,12))
gam1 <- glm(lot1 ~ log(u), data = clotting, family = Gamma)
sum(llcont(gam1))
logLik(gam1)

nonnest2 documentation built on Aug. 13, 2023, 5:07 p.m.