Top Questions

1. In R, sample n rows from a df in which a certain column has non-NA values (sample conditionally)
   12 votes

   5 answers
2. In R, collapse over multiple logical rows of the same ID into 1 row
   4 votes

   2 answers
3. In R, what's the average number of repeated column values per ID?
   4 votes

   3 answers
4. In R, indicate whether another column has more than one unique value per ID
   4 votes

   3 answers
5. Using the apply family in R to pass each row of a 2-column dataframe to a function I made?
   3 votes

   2 answers