[R] Problems with date-format (R 2.1.1 + chron)

Gabor Grothendieck ggrothendieck at gmail.com
Wed Jul 20 03:49:30 CEST 2005

I think its likely that you are using different versions of chron.
I noticed that version "2.2-33" of chron had the statement:

   tms <- dts - trunc(dts)

but version "2.2-35" seems to have replaced it with:

  tms <- dts - floor(dts)

and that seems to be causing the problem.

As a workaround:

    floor.Date <- floor.trunc
    days(as.Date("21-07-2005", "%d-%m-%y"))

On 7/19/05, Carsten Steinhoff <carsten.steinhoff at stud.uni-goettingen.de> wrote:
> Hello,
> today I've updated on the newest R-Version. But sadly a function I needed
> didnt want to work:
> The input is e.g.
> days(as.Date("21-07-2005","%d-%m-%y"))
> the error is: Fehler in Math.Date(dts): floor nicht definiert für Date
> Objekte
> (Error in Math.Date(dts): floor not defined for date objects)
> Same for year. Only months gives me the correct output.
> In Version 2.01 it worked very well, with the same chron library.
> Whats wrong ?
> Carsten
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