BIC.logLik {nlme} | R Documentation

## BIC of a logLik Object

### Description

This function calculates the Bayesian information criterion, also known as Schwarz's Bayesian criterion (SBC) for an object inheriting from class `logLik`, according to the formula log-likelihood + npar*log(nobs), where npar represents the number of parameters and nobs the number of observations in the fitted model. When comparing fitted objects, the smaller the BIC, the better the fit.

### Usage

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

### Arguments

`object` | an object inheriting from class `logLik`, usually resulting from applying a `logLik` method to a fitted model object.
`...` | some methods for this generic use optional arguments. None are used in this method.

### Value

a numeric value with the corresponding BIC.

### Author(s)

Jose Pinheiro Jose.Pinheiro@pharma.novartis.com and Douglas Bates bates@stat.wisc.edu

### References

Schwarz, G. (1978) "Estimating the Dimension of a Model", Annals of Statistics, 6, 461-464.

### See Also

`BIC`, `logLik`, `AIC`.

### Examples

    data(Orthodont)
    fm1 <- lm(distance ~ age, data = Orthodont)
    BIC(logLik(fm1))

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