"+" operator on characters revisited
On Jan 22, 2011, at 21:08 , Vitalie S. wrote:
The only definite argument occurred in the thread against "+" operator was the lack of commutativity (as if one have to prove algebraic theorems in R).
I think the real killer was associativity, combined with coercion rules: Is "x"+1+2 supposed to be equal to "x12" or "x3"?
Peter Dalgaard Center for Statistics, Copenhagen Business School Solbjerg Plads 3, 2000 Frederiksberg, Denmark Phone: (+45)38153501 Email: pd.mes at cbs.dk Priv: PDalgd at gmail.com