Top Questions

1. dplyr filter with condition on multiple columns
   37 votes

   6 answers
2. dplyr pipe: how to add a margin row calculating a total (like addmargins function - base)
   4 votes

   1 answers
3. dplyr duplicate each line by a sequence
   4 votes

   2 answers
4. Separate multi-value obs with pairs of values and count
   4 votes

   3 answers
5. select columns with contains only numeric values >= 0
   3 votes

   4 answers