The thread below has a number of solutions. I personally like the one with sprintf(). https://stat.ethz.ch/pipermail/r-help/2010-July/246059.html
B. On Dec 4, 2015, at 5:51 AM, BARLAS Marios 247554 <marios.bar...@cea.fr> wrote: > Hello everyone, > > I am an R rookie and I'm learning as I program. > > I am working on a script to process a large amount of data: I read a pattern > of filenames in the folder I want and import their data > > filenames = list.files(path, pattern="*Q_Read_prist*") > > myfiles = lapply(filenames, function(x) read.xlsx2(file=x, sheetName="Data", > header=TRUE, FILENAMEVAR=x)) > > The problem is that R recognizes the files in a 'non human' order. > > Q_Read_prist#1...@1.xls Q_Read_prist#1...@1.xls > Q_Read_prist#1...@10.xls Q_Read_prist#1...@10.xls > Q_Read_prist#1...@11.xls Q_Read_prist#1...@11.xls > Q_Read_prist#1...@12.xls Q_Read_prist#1...@12.xls > Q_Read_prist#1...@13.xls Q_Read_prist#1...@13.xls > Q_Read_prist#1...@14.xls Q_Read_prist#1...@14.xls > Q_Read_prist#1...@15.xls Q_Read_prist#1...@15.xls > Q_Read_prist#1...@16.xls Q_Read_prist#1...@16.xls > Q_Read_prist#1...@17.xls Q_Read_prist#1...@17.xls > Q_Read_prist#1...@18.xls Q_Read_prist#1...@18.xls > Q_Read_prist#1...@19.xls Q_Read_prist#1...@19.xls > Q_Read_prist#1...@2.xls Q_Read_prist#1...@2.xls > Q_Read_prist#1...@3.xls Q_Read_prist#1...@3.xls > Q_Read_prist#1...@4.xls Q_Read_prist#1...@4.xls > Q_Read_prist#1...@5.xls Q_Read_prist#1...@5.xls > Q_Read_prist#1...@6.xls Q_Read_prist#1...@6.xls > Q_Read_prist#1...@7.xls Q_Read_prist#1...@7.xls > Q_Read_prist#1...@8.xls Q_Read_prist#1...@8.xls > Q_Read_prist#1...@9.xls Q_Read_prist#1...@9.xls > > I tried to order them using order or sort but it doesn' seem to work. I have > had the same issue in matlab but there I have a function to re-define the > order in a "correct" way. > > Anyone knows of a smart way to sort these guys from 1 to 19 ascending or > descending? > > Thanks in advance, > Mario > > [[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. ______________________________________________ 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.
