logLik.gnls               package:nlme               R Documentation

Log-Likelihood of a gnls Object

Description:

     Returns the log-likelihood value of the nonlinear model
     represented by 'object' evaluated at the estimated coefficients.

Usage:

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

Arguments:

  object: an object inheriting from class 'gnls', representing a
          generalized nonlinear least squares fitted model.

    REML: an optional logical value. If 'TRUE' the restricted
          log-likelihood is returned, else, if 'FALSE', the
          log-likelihood is returned. Defaults to 'FALSE'. 

     ...: some methods for this generic require additional arguments. 
          None are used in this method.

Value:

     the log-likelihood of the linear model represented by 'object'
     evaluated at the estimated coefficients.

Author(s):

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

See Also:

     'gnls'

Examples:

     data(Soybean)
     fm1 <- gnls(weight ~ SSlogis(Time, Asym, xmid, scal), Soybean,
                 weights = varPower())
     logLik(fm1)

