On Wed, Jul 23, 2008 at 4:54 AM, Michal J. Figurski <[EMAIL PROTECTED]> wrote: > Dear all, > > Since you guys are frank, let me be frank as well. I did not ask anyone to > impose on me their point of view on bootstrap. It's my impression that this is > what you guys are trying to do - that's sad. Some of your emails in this > discussion are worth less than junk mail - particularly the ones from Mr > Harold > Doran. It's even more sad that you use junior members of this forum to make > fun > and intimidate. > > Apparently, even with all your expertise and education in this area, many of > you > - experts - do not understand what I am talking about. You seem to be so much > affixed to your expertise, that you can't see anything beyond it. > > Dear experts: if you do not wish to answer a question, why do you take time to > send useless emails? > > Honestly, if you wished to help and educate me, these words as in email below > would never see light. Now that is expert advice. I am impressed! > > > -- > Michal J. Figurski >
It seems as if there are two issues here: 1) Learning R and 2) Learning statistics. As for 1), here is a solution to what i think you wanted to do (and as always, if you had provided some sample data and code attempts it would have made things easier): figurski.df<-data.frame(name=1:109,num1=rnorm(109),num2=rnorm(109),num3=rnorm(109),outcome=sample(c(1,0),109,replace=T)) library(Design) lrm(outcome~num1+num2+num3,data=figurski.df)$coef coef<-list() for (i in 1:100){ tempData<-figurski.df[sample(1:109,replace=T),] coef[[i]]<-lrm(outcome~num1+num2+num3,data=tempData)$coef } coef.df<-data.frame(do.call(rbind,coef)) median(coef.df$num1) I've never tried using any of the prepackaged bootstrap functions since it's so easy to write your own. And I never really figured out why you wanted to split the data in two, unless you do it before bootstrapping to have a test set. Regards, Gustaf -- Gustaf Rydevik, M.Sci. tel: +46(0)703 051 451 address:Essingetorget 40,112 66 Stockholm, SE skype:gustaf_rydevik ______________________________________________ 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.