Top Questions

1. Create new column from existing one with more values in it
   2 votes

   2 answers
2. Find list of indices before specific value in column for each unique id
   2 votes

   1 answers
3. Find previous row with the same ID and condition on column value to assign weight
   1 votes

   1 answers
4. Assign weights to observations based on date difference and sequence condition
   1 votes

   1 answers
5. Assigning higher weigth to recent month observations for ML model
   1 votes

   1 answers