R/logLik.R

In fitdistrplus: Help to Fit of a Parametric Distribution to Non-Censored or Censored Data

#############################################################################
#   Copyright (c) 2009 Marie Laure Delignette-Muller, Regis Pouillot, Jean-Baptiste Denis, Christophe Dutang                                                                                                  
#                                                                                                                                                                        
#   This program is free software; you can redistribute it and/or modify                                               
#   it under the terms of the GNU General Public License as published by                                         
#   the Free Software Foundation; either version 2 of the License, or                                                   
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#   This program is distributed in the hope that it will be useful,                                                             
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#   Free Software Foundation, Inc.,                                                                                                              
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#############################################################################
### log likelihood
###
###         R functions
###

#logLik already defined in R
#
#logLik <- function(object, ...)
#    UseMethod("logLik")
#
#logLik.default <- function(object, ...)
#    return(object)

logLik.fitdist <- function(object, ...)
{
    stopifnot(inherits(object, "fitdist"))
    
    if(is.null(object$loglik))
        stop("Internal error in loglik.fitdist")
    else
        return(object$loglik)
}

logLik.fitdistcens <- function(object, ...)
{
    stopifnot(inherits(object, "fitdistcens"))
    
    if(is.null(object$loglik))
        stop("Internal error in loglik.fitdistcens")
    else
        return(object$loglik)
}