[R] replacing characters in formulae / models

Christoph Scherber Christoph.Scherber at agr.uni-goettingen.de
Thu Nov 6 16:50:52 CET 2008

Dear all,

How can I replace text in objects that are of class "formula"?

y="a * x + b"

Suppose I would like to replace the "x" by "w" in the formula object "y".

How can this be done? Somehow, the methods that can be used in character objects do not work 1:1 in 
formula objects...

Many thanks and best wishes

Dr. rer.nat. Christoph Scherber
University of Goettingen
DNPW, Agroecology
Waldweg 26
D-37073 Goettingen

phone +49 (0)551 39 8807
fax   +49 (0)551 39 8806

Homepage http://www.gwdg.de/~cscherb1

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