[R] sum with times

[Martin Maechler]

>>>>> "RRJ" == Ronaldo Reis Junior <chrysopa at gmail.com>
>>>>>     on Sun, 19 Dec 2010 12:10:54 -0200 writes:

    RRJ> Hi, Forget, the chron package work with this

No, don't forget, rather solve the problem:

  Date / dateTime  classes are "native R entities";
  extension package 'chron' objects are not.