Using regexp to select rows in R dataframe

Question

I\'m trying to select rows in a dataframe where the string contained in a column matches either a regular expression or a substring:

dataframe:

Answer 1

Why not just:

grep 'ADN'|grep '2011-02-10_R2'

You could also do this:

grep -P '\t.{4}(ADN).*(2011-02-10_R2).*'