Top Questions

1. Using grepl to match names that have one specific number
   5 votes

   1 answers
2. Adding a new year variable to a data frame (with all other variables being duplicated)
   4 votes

   5 answers
3. Expanding a matrix to include rows for each element in an interval
   4 votes

   2 answers
4. How to calculate weighted means for each column (or row) of a matrix using the columns (or rows) from another matrix?
   3 votes

   2 answers
5. Adding rows of two categorical variables in a long dataset?
   2 votes

   3 answers