R help - Jan 2010 - does any package have the functionality of ace() from old acepack?

I found the old ace function (from acepack) valuable a couple of years ago
in helping to find a transformation of the response to approximate
additivity in smooth functions of the predictors. 
ace used alternating conditional expectations, but I'm not overly fixated on
algorithms as long
as it works pretty well.

Is there another package that has that sort of functionality? I haven't been
able to locate one, 
but maybe I missed something.




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Acepack is still in the archive section of CRAN:

http://cran.r-project.org/src/contrib/Archive/acepack/acepack_1.3-2.2.tar.gz

It seems to work despite the warning, but I guess you'd better test
it.

It is very simple: a few very old fortran scripts and an R wrapper by
Thomas Lumley.  I'm going to look into what needs to be done to bring
it up to date, but no promises.

A similar function is transace from the Hmisc package:

http://finzi.psych.upenn.edu/library/Hmisc/html/transace.html

I'm not sure that this does the same thing as ace.

Jon

On 01/18/10 02:11, GlenB wrote:
> 
> 
> I found the old ace function (from acepack) valuable a couple of years ago
> in helping to find a transformation of the response to approximate
> additivity in smooth functions of the predictors. 
> ace used alternating conditional expectations, but I'm not overly
fixated on
> algorithms as long
> as it works pretty well.
> 
> Is there another package that has that sort of functionality? I haven't
been
> able to locate one, 
> but maybe I missed something.
-- 
Jonathan Baron, Professor of Psychology, University of Pennsylvania
Home page: http://www.sas.upenn.edu/~baron