[R] Disentagling formulas

Eik Vettorazzi E.Vettorazzi at uke.uni-hamburg.de
Mon Oct 1 17:34:13 CEST 2007

maybe I didn't understand the problem, but you can do sth like


will help you too.


Rebecca Sela schrieb:
> I am writing a program in which I would like to take in a formula, change the response (Y) variable into something else, and then pass the formula, with the new Y variable to another function.  That is, I am starting with 
>          formula <- Y~X1+X2+X3
> and I'd like to do something like
>          Y <- formula$Y
>          newY <- f(Y)
>          lm(newY~X1+X2+X3)
> So far, it seems that my only option will be a very complicated sequence of steps involving match.call().  Is there a simpler way to change the response variable in a formula?
> Thanks in advance!
> Rebecca
> --
> Rebecca Sela
> Statistics Department
> Stern School of Business
> New York University
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Eik Vettorazzi
Institut für Medizinische Biometrie und Epidemiologie
Universitätsklinikum Hamburg-Eppendorf

Martinistr. 52
20246 Hamburg

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