Top Questions

1. Group by ID and Outcome and take the earliest earliest Dates of specific outcomes and assign numbers (i.e outcome1, outcome2)
   3 votes

   1 answers
2. Add a value as a new row to a dataframe but keep all other columns NA
   2 votes

   2 answers
3. Add a new row with a certain value into the first column and then "-" to the rest of the columns
   2 votes

   2 answers
4. Group by id and drug (with dates <100 days of each other) take the earliest and latest date
   1 votes

   1 answers