[R] isotonic regression

[Liaw, Andy]

Not sure what model you have in mind.  If a model of the form E(y) = f(x1,
x2) = f1(x1) + f2(x2) (i.e., additive) is sufficient, you can use the
packages `mgcv' or `gbm', both of which provide options to constrain f1 or
f2 to be monotone.

HTH,
Andy

> From: Nathan Leon Pace, MD, MStat
> 
> Hi,
> 
> Has anyone written code for isotonic regression on ordered 
> rectangular 
> grids?
> 
> Nathan
> 
> Nathan Leon Pace, MD, MStat
> University of Utah
> Salt Lake City, UT 84132
> Office: 801.581.6393
> Fax: 801.581.4367
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> 
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