Model Formulae of systemfit Objects
This method extracts the model formulae
from fitted objects returned by systemfit
.
## S3 method for class 'systemfit' formula( x, ... ) ## S3 method for class 'systemfit.equation' formula( x, ... )
x |
an object of class |
... |
currently not used. |
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.
Arne Henningsen arne.henningsen@googlemail.com
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 )
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