Brendan, I think you should create objects outside of the "for" loop. You can't create objects instide the loop. You can try this:
metalist1<-list() for(i in 1:10) {metalist1[[i]]<-assign(paste("theta1_",i,sep=""),data.frame(scale(rnorm(250))))} lapply(metalist1,function(x){print(dim(x))}) # Checking it out metalist2<-list() for(i in 1:10) {metalist2[[i]]<-assign(paste("theta1_",i,sep=""),data.frame(scale(rnorm(250))))} lapply(metalist1,function(x){print(dim(x))}) # Checking it out metalist3<-list() for(i in 1:10) {metalist3[[i]]<-metalist1[[i]]+metalist2[[i]]} lapply(metalist3,function(x){print(dim(x))}) # Checking it out # Checking sum(metalist1[[1]]+metalist2[[1]]) sum(metalist3[[1]]) Dimitri On Mon, Apr 20, 2009 at 2:35 PM, Brendan Morse <morse.bren...@gmail.com> wrote: > Hi everyone, I am trying to calculate a particular variable (vector) from > some previously defined variables in a loop but I am having trouble figuring > out how to get the loop to recognize that it should index for the previously > defined objects. Here is a simplified version of what I am trying to do: > > for(i in 1:10){ > > assign(paste("theta1_",i,sep=""),data.frame(scale(rnorm(250)))) > > assign(paste("theta2_",i,sep=""),data.frame(scale(rnorm(250)))) > assign(paste("theta3_",i,sep=""),data.frame(theta1_i + > theta2_i) > } > > I am having trouble with getting it to recognize that theta3_i should be > calculated using theta1_i and theta2_i in the third line. In other words, > theta3_1 should equal theta1_1+theta2_1 whereas theta3_2 should equal > theta1_2+theta2_2 > > Any advice as to where I am losing this one? > > Thanks, > brendan > > [[alternative HTML version deleted]] > > ______________________________________________ > 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. > -- Dimitri Liakhovitski MarketTools, Inc. dimitri.liakhovit...@markettools.com ______________________________________________ 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.