[R] [Rd] New errors with difftime()-objects in 2.11.1 (was Re: Request: difftime method for cut())

Peter Dalgaard pdalgd at gmail.com
Wed Jun 23 07:13:58 CEST 2010

Gustaf Rydevik wrote:

> Oh, I forgot to mention that the workaround of using as.double (or
> as.numeric) works fine, and I've done that.
> It's just that it can take quite a while (as in several hours) to
> figure out that the reason for the error is that you have to force
> difftime objects to be numeric in 2.11.1, when the code's been working
> fine before and the error messages are obscure.

I don't think you realize the problems that could occur by assuming that
difftime objects are numerics ON ANY PARTICULAR SCALE!

Peter Dalgaard
Center for Statistics, Copenhagen Business School
Phone: (+45)38153501
Email: pd.mes at cbs.dk  Priv: PDalgd at gmail.com

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