update.modelStruct {nlme} | R Documentation

## Update a modelStruct Object

### Description

This method function updates each element of `object`, allowing the access to `data`.

### Usage

    ## S3 method for class 'modelStruct':
    update(object, data, ...)

### Arguments

`object` | an object inheriting from class `modelStruct`, representing a list of model components, such as `corStruct` and `varFunc` objects.
`data` | a data frame in which to evaluate the variables needed for updating the elements of `object`.
`...` | some methods for this generic require additional arguments. None are used in this method.

### Value

an object similar to `object` (same class, length, and names), but with updated elements.

### Note

This method function is primarily used within model fitting functions, such as `lme` and `gls`, that allow model components such as variance functions.

### Author(s)

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

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