[R] how to generate a function from a linear model

[Roger D. Peng]

I don't think there's an automatic way to do this but you might try 
something like:

model <- lm(sat.d~1+sat.n+I(sat.n^2))

f <- function(x) { predict(model, data.frame(sat.n = x)) }

-roger

Tony Han Bao wrote:
> Hi All,
> 
> I am trying to generate a function from a linear model. I think there 
> should be build-in function that perform this action but I've had no 
> luck finding it.
> 
> For example, I have a model created using lm().
> 
>     model <- lm(sat.d~1+sat.n+I(sat.n^2))
> 
> What I would like to have is a function (similar to the one generated by 
> splinefun()) so that I can use it on different data-sets.
> 
> Thanks in advance for the help.
> 
> Tony Han Bao
> tonybao at mac.com
> 
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-- 
Roger D. Peng
http://www.biostat.jhsph.edu/~rpeng/