Extracting the log likelihood

logLik extracts the value of the log likelihood function evaluated at the parameter estimates.

Usage

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

Arguments

object

an object of class 'drc'.

...

additional arguments.

Value

The evaluated log likelihood as a numeric value and the corresponding degrees of freedom as well as the number of observations as attributes.

Author

Christian Ritz

Examples

## Fitting a four-parameter log-logistic model
ryegrass.m1 <- drm(rootl ~ conc, data = ryegrass, fct = LL.4())
logLik(ryegrass.m1)
#> 'log Lik.' -16.15514 (df=5)