formula.systemfit {systemfit}R Documentation

Model Formulae of systemfit Objects

Description

This method extracts the model formulae from fitted objects returned by systemfit.

Usage

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

Arguments

x an object of class systemfit.
... currently not used.

Value

formula.systemfit.equation returns the formula of a single equation of a systemfit object. formula.systemfit.equation returns a list of formulae: one formula object for each equation of the systemfit object.

Author(s)

Arne Henningsen arne.henningsen@googlemail.com

See Also

systemfit, formula

Examples

data( "Kmenta" )
eqDemand <- consump ~ price + income
eqSupply <- consump ~ price + farmPrice + trend
system <- list( demand = eqDemand, supply = eqSupply )

## perform a SUR estimation
fitsur <- systemfit( system, "SUR", data = Kmenta )

## formula of the second equation
formula( fitsur$eq[[2]] )

## all formulae of the system
formula( fitsur )

[Package systemfit version 1.0-7 Index]