nlme (version 3.1-39)

formula.nlme: Extract nlme Object Formula

Description

This method function extracts the nonlinear model formula associated with x.

Usage

## S3 method for class 'nlme':
formula(x, \dots)

Arguments

x

an object inheriting from class nlme, representing a fitted nonlinear mixed-effects model.

...

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

Value

• a two-sided nonlinear formula specifying the model used to obtain x.

See Also

nlme

Examples

data(Loblolly)
fm1 <- nlme(height ~ SSasymp(age, Asym, R0, lrc),
            data = Loblolly,
            fixed = Asym + R0 + lrc ~ 1,
            random = Asym ~ 1,
            start = c(Asym = 103, R0 = -8.5, lrc = -3.3))
formula(fm1)