search for: indicators1

Dear, I'm doing analysis where I need to work on relatively large (50-60 MB) text files, though I'm really interested only in parts with binary variables (named indicators1, indicators2, ... etc.) Every text file contains other numeric columns, but not always the same and not always in the same order - therefore I would rather need a method connecting to file and reading only colums with respect to name pattern (ie indicators + number). That should speed things up (n...