[R] Better way to find function

Liaw, Andy andy_liaw at merck.com
Wed Jan 21 15:10:06 CET 2004

For #1, could you clarify what you mean by `function', an R function, or a
regression function?

For #2, there are several packages on CRAN (and in the R distribution
itself) that fit regression splines, if that's what you meant by `piecewise
regression'.  For logistic regression, you can either use the bs() term in
glm(), or gam() in the `mgcv' package.


> From: nuvo nuvo
> To whom it may concern,
> 1. I would like to know if there is a command in R to choose 
> a function for 
> a given dataset. I am facing a difficult question about how 
> to fit the data 
> [ please attachment ]
> 2. Are there any function that will allow users to do the piecewise 
> regression?
> If not, is it going to be provide in the new updated version? 
> What I am 
> using is the piecewise logistic regression, but it doesn't 
> have a continuous 
> function though. I hope that R would have a specific command 
> to do the 
> piecewise (non)linear regression.
> I would apprecaite your suggestion.
> Sincerely yours,
> Nhum
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