R: Return the log likelihood value

logLik.maxLik {maxLik} | R Documentation

## Return the log likelihood value

### Description

Return the log likelihood value of objects of class `maxLik` and `summary.maxLik`.

### Usage

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

### Arguments

`object` | object of class `maxLik` or `summary.maxLik`, usually a model estimated with Maximum Likelihood
`...` | additional arguments to methods

### Value

A scalar numeric, log likelihood of the estimated model

### Author(s)

Arne Henningsen, Ott Toomet

### See Also

`maxLik`

### Examples

    ## ML estimation of exponential duration model:
    t <- rexp(100, 2)
    loglik <- function(theta) log(theta) - theta*t
    gradlik <- function(theta) 1/theta - t
    hesslik <- function(theta) -100/theta^2
    ## Estimate with analytic gradient and hessian
    a <- maxLik(loglik, gradlik, hesslik, start=1)
    ## print log likelihood value
    logLik( a )
    ## print log likelihood value of summary object
    b <- summary( a )
    logLik( b )

[Package maxLik version 1.3-4 Index]