alilja's issue isn't 1-indexing, it's R's completely insane decision to return usable numerical values for an array access error. In Mathematica or Matlab accid

alilja's issue isn't 1-indexing, it's R's completely insane decision to return usable numerical values for an array access error. In Mathematica or Matlab accidentally using 0-indexing would lead to obvious errors, while in R it often doesn't - especially if you have sparse/many zero data already