What sort of message is this to send to the younger generation?> plastic = 1:5 > card = 1:4 > board = 1:4 > plastic/crossprod(card,board)[1] 0.03333333 0.06666667 0.10000000 0.13333333 0.16666667 Warning message: In plastic/crossprod(card, board) : Recycling array of length 1 in vector-array arithmetic is deprecated. Use c() or as.vector() instead. ok, I can write c(crossprod()) but it is ugly, and environmentally wasteful. What?s next? Warnings for my beloved outer(card, board) * board