ExtDist (version 0.7-2)

DistSelCriteria: Distribution Selection Criteria.

Description

A function to calculate the distribution selection criteria for a list of candidate fits.

Usage

DistSelCriteria(
  X,
  w = rep(1, length(X))/length(X),
  candDist = c("Beta_ab", "Laplace", "Normal"),
  criteria = c("logLik", "AIC", "AICc", "BIC", "MDL")
)

Value

An object of class matrix, containing the listed distribution selection criteria for the named distributions.

Arguments

X

Sample obersevations.

w

An optional vector of sample weights.

candDist

A vector of names of candidate distributions.

criteria

A vector of criteria to be calculated.

Author

Haizhen Wu and A. Jonathan R. Godfrey.

Details

When comparing models fitted by maximum likelihood to the same data, the smaller the AIC, BIC or MDL, the better the fit. When comparing models using the log-likelihood criterion, the larger the log-likelihood the better the fit.

Examples

Ozone <- airquality$Ozone
Ozone <- Ozone[!is.na(Ozone)] # Removing the NA's from Ozone data
DistSelCriteria(Ozone, candDist = c("Gamma", "Weibull", "Normal", "Exp"),
criteria = c("logLik","AIC","AICc", "BIC"))