Hello R helpers! I'm using the avas function form package acepack (called from areg.boot package Hmisc) to estimate automatically transformations of predictors (in this case monotonous) and response. Well, it seems to work quite well, but I have 3 basic questions: - which set of basis functions is used in this procedure? - how do I back transform my estimate (y hat ) to the originasl scale? - is there a closed analytical description of the model used? If so, how do I get it? Thanks a lot Anne ---------------------------------------------------- Anne Piotet Email: anne.piotet@m-td.com --------------------------------------------------- M-TD Modelling and Technology Development PSE-C CH-1015 Lausanne Switzerland Tel: +41 21 693 83 98 Fax: +41 21 646 41 33 -------------------------------------------------- [[alternative HTML version deleted]]
Anne wrote:> Hello R helpers! > I'm using the avas function form package acepack (called from areg.boot package Hmisc) to estimate automatically transformations of predictors (in this case monotonous) and response. > > Well, it seems to work quite well, but I have 3 basic questions: > - which set of basis functions is used in this procedure? > - how do I back transform my estimate (y hat ) to the originasl scale?Please read docs for areg.boot. predict.areg.boot does this already, using reverse linear interpolation.> - is there a closed analytical description of the model used? If so, how do I get it?No Frank> > Thanks a lot > Anne > > > ---------------------------------------------------- > Anne Piotet > Email: anne.piotet at m-td.com > --------------------------------------------------- > M-TD Modelling and Technology Development > PSE-C > CH-1015 Lausanne > Switzerland > Tel: +41 21 693 83 98 > Fax: +41 21 646 41 33 > -------------------------------------------------- > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at stat.math.ethz.ch mailing list > stat.math.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! R-project.org/posting-guide.html >-- Frank E Harrell Jr Professor and Chair School of Medicine Department of Biostatistics Vanderbilt University