logLik.choicer_fit: Extract log-likelihood from a choicer_fit object

In choicer: Discrete Choice Models for Economic Applications

Extract log-likelihood from a choicer_fit object

Description

Returns a logLik object, which enables AIC() and BIC() automatically.

Usage

## S3 method for class 'choicer_fit'
logLik(object, ...)

Arguments

object	A choicer_fit object.
...	Additional arguments (ignored).

Value

A logLik object with df and nobs attributes.

Examples

library(data.table)
set.seed(42)
N <- 50; J <- 3
dt <- data.table(id = rep(1:N, each = J), alt = rep(1:J, N))
dt[, `:=`(x1 = rnorm(.N), x2 = rnorm(.N))]
dt[, choice := 0L]
dt[, choice := sample(c(1L, rep(0L, J - 1))), by = id]
fit <- run_mnlogit(dt, "id", "alt", "choice", c("x1", "x2"))
logLik(fit)
AIC(fit)
BIC(fit)

choicer documentation built on Sept. 5, 2026, 1:07 a.m.