I am looking a way to create a subset on all columns name that "start with" a specific character. My data contains the same column name multiple time with a digit number at the end and I want the code to always select all the columns regardless the last digit numbers and give the filter criteria on all the columns together .   So here from the above table , I want only those observations where any of these columns starting with "apple" contains "one" . Thank you    ... View more