predict.gnls {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)

José Pinheiro and Douglas Bates bates@stat.wisc.edu

### See Also

`gnls`

### Examples

    fm1 <- gnls(weight ~ SSlogis(Time, Asym, xmid, scal), Soybean,
                weights = varPower())
    newSoybean <- data.frame(Time = c(10,30,50,80,100))
    predict(fm1, newSoybean)

[Package nlme version 3.1-131 Index]