On Mon, Aug 9, 2010 at 6:43 AM, Harsh <singhal...@gmail.com> wrote: > Hello useRs, > > I have a problem at hand which I'd think is fairly common amongst > groups were R is being adopted for Analytics in place of SAS. > Users would like to obtain results for logistic regression in R that > they have become accustomed to in SAS. > > Towards this end, I was able to propose the Design package in R which > contains many functions to extract the various metrics that SAS > reports. > > If you have suggestions pertaining to other packages, or sample code > that replicates some of the SAS outputs for logistic regression, I > would be glad to hear of them. > > Some of the requirements are: > - Stepwise variable selection for logistic regression > - Choose base level for factor variables > - The Hosmer-Lemeshow statistic > - concordant and discordant > - Tau C statistic >
For stepwise logistic regression using AIC see: library(MASS) ?stepAIC For specifying reference level: ?relevel ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
