Top Questions

1. How to transform selected rows into a single column in R
   6 votes

   6 answers
2. Select last non-zero value before each run of zero, by group
   4 votes

   4 answers
3. How to keep other columns when using dplyr?
   3 votes

   3 answers
4. Calculate cumulative sum (cumsum) floored at zero
   3 votes

   2 answers