Message-ID: <Pine.LNX.4.44.0404020603590.3322-100000@gannet.stats>
Date: 2004-04-02T07:06:02Z
From: Brian Ripley
Subject: R1,9,0beta: strange summary of Date object
In-Reply-To: <406CACDE.4465.317BEF3@localhost>
On Thu, 1 Apr 2004 kjetil@entelnet.bo wrote:
> Hola!
>
> Any explanation of the following:
>
> > summary(as.Date(rep(NA,20)))
> Min. 1st Qu. Median Mean 3rd Qu.
> Max.
> NA NA NA NA NA
> NA
> NA's
> "1970-01-21"
>
> Where does this 1970 date come from?
By coercion. Same thing happens with POSIXct. It could be improved, but
seems to have caused no real problems in the POSIXct case.
--
Brian D. Ripley, ripley@stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272866 (PA)
Oxford OX1 3TG, UK Fax: +44 1865 272595