Dear all, I have more than 200 text files in a folder without header - example below. I would like to read, add a common date header to all the files, and write (replace) the files.
## Read files filelist = list.files(pattern = ".*.txt") datalist = lapply(filelist, function(x)read.table(x, header=F)) ## What I want to add date <- 20000101 datalist _new <- lapply(datalist, function(x) rbind(x, date)) How do I add this date as a common header and replace the files? Any help will be highly appreciated. Thank you. Best, Milu ## Sample data xy <- dput(head(x,6)) structure(list(V1 = c("-5.28082885742185,-0.509039307", "-6.09873046874998,-0.349584961", "-2.07150878906248,6.264276123", "-1.11102905273435,6.365716553", "2.37749633789065,14.57106934", "4.9619079589844,18.91350708" )), row.names = c(NA, 6L), class = "data.frame") [[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.