Top Questions

1. Fill missing values (NA) before the first non-NA value by group
   3 votes

   2 answers
2. Filter after two consecutive values are observed by group
   2 votes

   3 answers
3. Select groups with only consecutive runs of a certain value
   2 votes

   5 answers
4. Fill the value forward until some condition satisfied
   1 votes

   3 answers
5. I need to replace some value of a columen by minimum value of that column for specific ids
   1 votes

   1 answers