Hi again all, @Rui, melt did the trick. Thanks!
I managed to make this thing work somehow. ABellow is the script for this : setwd("C:/Users/mpavlic/Desktop/HE Krsko/HEK/FOC/Data/Jun/DDF") library(reshape2) library(sqldf) #imena datotek txt_files = list.files(pattern = '*.ddf'); flist<-txt_files flistNew <- sub("^channel 1 ([0-9 ]+).*", "\\1", flist) flistNew <-c("D",flistNew) # koordinate posamezne lokacije vzdolž FOC coordinate<-read.csv("coordinate_linija1.csv", sep=";", dec=".")[,2:4] D<-seq(1,970,by=1) coordinate<-(cbind(D,coordinate)) #dolžina vzdolž FOC #Length <- read.table(flist[1], skip=917, nrows=970)[, 1] Temp <- do.call(cbind, lapply(flist, function(x) read.table(x, skip=917, nrows=970)[, 2])) Temp1<-as.data.frame(cbind(D,Temp)) colnames(Temp1)<-flistNew # zdruzi v tableo, tako da so temperature za posameni file po vrsticah dm <- melt(Temp1, id=("D")) dm <-data.frame(X=11.11, Y=11.11, dolzina=11.11, dm) But i have another problem... Is it possible to trnasform the names of each file which are listed in the variable txt_files to official R DateTime format? For example : so that this : "channel 1 20120601 003507 00001.ddf" would be saved like this "2012-06-07 00:35:07" Thanks for the help -- View this message in context: http://r.789695.n4.nabble.com/importing-multiple-file-form-folder-tp4631637p4632942.html Sent from the R help mailing list archive at Nabble.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.