lm with an arbitrary number of terms

I think you can do it like this

lm(y~., data=data.frame) # note the dot to the right of ~
-----Original Message-----
From: Richard Nixon [mailto:richard.nixon at mrc-bsu.cam.ac.uk]
Sent: Wednesday, April 02, 2003 8:50 AM
To: r-help at stat.math.ethz.ch
Subject: [R] lm with an arbitrary number of terms 

Hello folks,

Any ideas how to do this?

data.frame is a data frame with column names "x1",...,"xn"
y is a response variable of length dim(data.frame)[1]

I want to write a function

function(y, data.frame){
    lm(y~x1+...+xn)
}

This would be easy if n was always the same.
If n is arbitrary how could I feed the x1+...+xn terms into 
lm(response~terms)?

Thanks
Richard

--
Dr. Richard Nixon
MRC Biostatistics Unit, Cambridge, UK
http://www.mrc-bsu.cam.ac.uk/personal/richard
Tel: +44 (0)1223 330382, Fax: +44 (0)1223 33038

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