formula.nls {nls}R Documentation

Extract Model Formula from nls Object

Description

Returns the model used to fit object.

Usage

## S3 method for class 'nls':
formula(x, ...)

Arguments

x an object inheriting from class nls, representing a nonlinear least squares fit.
... further arguments passed to or from other methods.

Value

a formula representing the model used to obtain object.

Author(s)

Jose Pinheiro and Douglas Bates

See Also

nls, formula

Examples

data(Orange)
fm1 <- nls(circumference ~ A/(1+exp((B-age)/C)), Orange,
  start = list(A=160, B=700, C = 350))
formula(fm1)

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