Hi Love, I am not sure if I understand your question and it will help if you provided a sample data frame, sample of your code and sample of your output and the output you desire. Having said that, I think you could use cbind to join all datasets into a matrix and use the apply family of functions to achieve what you are after.
On Mon, Dec 4, 2017 at 6:33 AM, Love Bohman <love.boh...@sociology.su.se> wrote: > Hi R-users! > Being new to R, and a fairly advanced Stata-user, I guess part of my > problem is that my mindset (and probably my language as well) is wrong. > Anyway, I have what I guess is a rather simple problem, that I now without > success spent days trying to solve. > > I have a bunch of datasets imported from Stata that is labelled aa_2000 > aa_2001 aa_2002, etc. Each dataset is imported as a matrix, and consists of > one column only. The columns consists of integer numbers. I need to convert > the data to vectors, which I found several ways to do. I use, for example: > aa_2000 <- as.numeric(aa_2000[,1]) > However, when trying to automate the task, so I don't have to write a line > of code for each dataset, I get stuck. Since I'm a Stata user, my first > attempt is trying to make a loop in order to loop over all datasets. > However, I manage to write a loop that works for the left-hand side of the > syntax, but not for the right-hand side. > I have included some examples from my struggles to solve the issue below, > what they all have in common is that I don't manage to call for any "macro" > (is that only a Stata-word?) in the right hand side of the functions. When > I try to replace the static reference with a dynamic one (like in the > left-hand side), the syntax just doesn't work. > > I would very much appreciate some help with this issue! > All the best, > Love > > year <- 2002 > dataname <- paste0("aa_",year) > assign(paste0(dataname), as.numeric(aa_2002[,1])) > > year <- 2003 > assign(paste0("aa_",year), as.numeric(aa_2003)) > > year <- 2005 > assign(paste0("aa_",year), aa_2005[,1]) > > list1 <- c(2000:2007) > list1[c(7)] > assign(paste0("aa_",list1[c(7)]), as.numeric(paste0(aa_2006))) > > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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. > [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see 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.