Top Questions

1. Is there an R function "parallel sum"?
   5 votes

   3 answers
2. R: calculating time-at-risk by age
   3 votes

   3 answers
3. Index a matrix using two equal-length vectors for row and column indices
   3 votes

   3 answers
4. R: adding rows in a data frame depending on another variable
   3 votes

   2 answers
5. Is there a function in R that splits a matrix along a margin using a factor or categorical vector?
   2 votes

   4 answers