Top Answers

1. How can I merge two dataframes together with some conditional requirements?
   7 votes
2. r - Efficient conditional join on multiple columns
   4 votes
3. How can I get key values belonging to multiple groups in my source data?
   3 votes
4. Draw a dashed transparent box around forecast lines
   2 votes
5. How to return row values that match column 'id' in both df1 and df2 but not column 'text' and return NA to the mismatch in column 'text'?
   2 votes