R: Updating and re-fitting a model

update.drc {drc} | R Documentation

## Updating and re-fitting a model

### Description

'update' updates and re-fits a model on the basis of an object of class 'drc'.

### Usage

      ## S3 method for class 'drc'
    update(object, ..., evaluate = TRUE)

### Arguments

`object` | an object of class 'drc'.
`...` | arguments to alter in object.
`evaluate` | logical. If TRUE model is re-fit; otherwise an unevaluated call is returned.

### Value

An object of class 'drc'.

### Author(s)

Christian Ritz

### Examples

    ## Fitting a four-parameter Weibull model
    model1 <- drm(ryegrass, fct = W1.4())

    ## Updating 'model1' by fitting a three-parameter Weibull model instead
    model2 <- update(model1, fct = W1.3())
    anova(model2, model1)

[Package drc version 3.0-1 Index]