How to add path to the list od list.files

General
1

Hello,

I have listed the files from a directory. How can I attach the path to the file names?

 old_files <- list.files(paste("~/Development/glycoPipeApp/OUT/openMS/INPUT_DATA/INPU_DATA_OUT/", old_file[i], sep = ""), pattern = "[0-9].csv"))

#Now I need to add the path to the files.  I started by using a loop
  for(i in 1:length(old_files)){
     old_path[i] <- paste("~/Development/glycoPipeApp/OUT/openMS/INPUT_DATA/INPU_DATA_OUT/", old_files[i], sep = "")
  }

#but it does not work. Ir produces and extra path, with an NA attached to it in place of the file name.

2

This doesn't directly answer your question, but just wanted to point out that list.files() includes a full.names argument that might be helpful for you.

full.names a logical value. If TRUE , the directory path is prepended to the file names to give a relative file path. If FALSE , the file names (rather than paths) are returned.

1 Like
3

Yes, that answers my question. thank you!