Thank you very much for your help, David! Now I have got an object which I can work with.
You mentioned that I took two steps to create the new column names. I had tried doing it in one step but couldn't find out how. Could you help me with that, as well? Thank you very much! Marion 2012/2/14 David Winsemius <[email protected]> > > On Feb 14, 2012, at 9:20 AM, Marion Wenty wrote: > > Dear R-helpers, >> >> I created an own function which looks like this >> >> s_elternmz <- function(Var="balt") >> > > { >> Dg_a<-mz[,c("asbhh","apkz",**Var)] >> colnames(Dg_a)[colnames(Dg_a)=**="apkz"]<-"bpkzm" >> colnames(Dg_a)[colnames(Dg_a)=**=Var]<-paste(Var,"_m",sep="") >> mz_int<-merge(mz,Dg_a,by=c("**asbhh","bpkzm"),all.x=T) >> colnames(Dg_a)[colnames(Dg_a)=**="bpkzm"]<-"bpkzv" >> >> colnames(Dg_a)[colnames(Dg_a)=**=paste(Var,"_m",sep="")]<-** >> paste(Var,"_v",sep="") >> > > Why take two steps to change that column name? > > > mz_int<-merge(mz_int,Dg_a,by=**c("asbhh","bpkzv"),all.x=T) >> > > You just overwrote an object that you created earklier but have not done > anything with in the meantime. > > mz_int <- >> mz_int[order(mz_int$asbhh,mz_**int$apkz), c(colnames(mz),paste(Var,"_m",* >> *sep=""), paste(Var,"_v",sep=""))] >> >> } >> >> My problem is that the objects are not saved in the workspace. Especially >> I >> need the object which I created in the end - mz_int - because I want to do >> calculations with it in R afterwards. >> > > Then just assign it: > > mz_result <- s_elternmz() > > As you have noticed, assignment inside a function is not a durable event. > The function returns the value of either its first encounter with return() > or the value > of hte last assignment (but not the name to which that object was > assigned.) Welcome to R's version of functional programming. > > >> Thank you very much for your help in advance. >> >> Marion >> >> [[alternative HTML version deleted]] >> >> ______________________________**________________ >> [email protected] mailing list >> https://stat.ethz.ch/mailman/**listinfo/r-help<https://stat.ethz.ch/mailman/listinfo/r-help> >> PLEASE do read the posting guide http://www.R-project.org/** >> posting-guide.html <http://www.R-project.org/posting-guide.html> >> and provide commented, minimal, self-contained, reproducible code. >> > > David Winsemius, MD > West Hartford, CT > > [[alternative HTML version deleted]] ______________________________________________ [email protected] 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.
