Update a gnls Object

DESCRIPTION:

The non-missing arguments in the call to the update.gnls method replace the corresponding arguments in the original call used to produce object and gnls is used with the modified call to produce an updated fitted object.

USAGE:

update(object, model, data, params, start, correlation, weights, subset, 
       na.action, naPattern, control, verbose)  

REQUIRED ARGUMENTS:

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

OPTIONAL ARGUMENTS:

other arguments
defined as in gnls. See that functions documentation for descriptions and default values for these arguments.

VALUE:

an updated gnls object.

SEE ALSO:

EXAMPLES:

fm1 <- gnls(weight ~ SSlogis(Time, Asym, xmid, scal), Soybean, 
            weights = varPower()) 
fm2 <- update(fm1, correlation = corAR1( form = ~1 | Plot ))