predict.gnls              package:nlme              R Documentation

Predictions from a gnls Object

Description:

     The predictions for the nonlinear model represented by 'object'
     are obtained at the covariate values defined in 'newdata'.

Usage:

     ## S3 method for class 'gnls':
     predict(object, newdata, na.action, naPattern, ...)

Arguments:

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

 newdata: an optional data frame to be used for obtaining the
          predictions. All variables used in the nonlinear model must
          be present in the data frame. If missing, the fitted values
          are returned.

na.action: a function that indicates what should happen when 'newdata'
          contains 'NA's.  The default action ('na.fail') causes the
          function to print an error message and terminate if there are
          any incomplete observations.

naPattern: an expression or formula object, specifying which returned
          values are to be regarded as missing.

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

Value:

     a vector with the predicted values.

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())
     newSoybean <- data.frame(Time = c(10,30,50,80,100))
     predict(fm1, newSoybean)

