From ripley at stats.ox.ac.uk  Thu Aug  7 11:48:01 2008
From: ripley at stats.ox.ac.uk (Prof Brian Ripley)
Date: Thu, 7 Aug 2008 10:48:01 +0100 (BST)
Subject: [Rd] sapply(Date, is.numeric) (PR#12008)
In-Reply-To: <20080807093220.5DEB0282EFC2@mail.pubhealth.ku.dk>
References: <20080807093220.5DEB0282EFC2@mail.pubhealth.ku.dk>
Message-ID: <alpine.LFD.1.10.0808071047540.26397@gannet.stats.ox.ac.uk>

For the record: this is now fixed.

On Thu, 7 Aug 2008, robert.mcgehee at geodecapital.com wrote:

> Full_Name: Robert McGehee
> Version: 2.7.1
> OS: Windows
> Submission from: (NULL) (192.223.226.6)
>
>
> R-developers,
> The results below seem inconsistent. From the documentation for is.numeric, I
> expect FALSE in both cases.
>
>> x <- data.frame(dt=Sys.Date())
>> is.numeric(x$dt)
> [1] FALSE
>> sapply(x, is.numeric)
>  dt
> TRUE
>
> ## Yet, sapply seems aware of the Date class
>> sapply(x, class)
>  dt
> "Date"
>
> Thanks,
> Robert
>
> PS. Sorry if this sent twice. I originally sent this on Monday to
> R-bugs at biostat.ku.dk, but it didn't seem to go through. Perhaps it's a
> deprecated  email address (?).
>
> ______________________________________________
> R-devel at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-devel
>

-- 
Brian D. Ripley,                  ripley at 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



[Rd] sapply(Date, is.numeric) (PR#12008)
Prof Brian Ripley