From ripley at stats.ox.ac.uk  Thu Aug  7 11:48:26 2008
From: ripley at stats.ox.ac.uk (Prof Brian Ripley)
Date: Thu, 7 Aug 2008 10:48:26 +0100 (BST)
Subject: [Rd] sapply(Date, is.numeric) (PR#11982)
In-Reply-To: <20080807092857.A2944282EFF1@mail.pubhealth.ku.dk>
References: <20080807092857.A2944282EFF1@mail.pubhealth.ku.dk>
Message-ID: <alpine.LFD.1.10.0808071048100.26397@gannet.stats.ox.ac.uk>

For the record: this is now fixed.

On Thu, 7 Aug 2008, 
Robert.McGehee at geodecapital.com wrote:

> R-developers,
> The results below are inconsistent. From the documentation for
> is.numeric, I expect FALSE in both cases.
>
>> x <- data.frame(dt=3DSys.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 McGehee, CFA
> Geode Capital Management, LLC
> One Post Office Square, 28th Floor | Boston, MA | 02109
> Tel: 617/392-8396    Fax:617/476-6389
> mailto:robert.mcgehee at geodecapital.com
>
>
>
> This e-mail, and any attachments hereto, are intended fo...{{dropped:13}}
>
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>

-- 
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#11982)
Prof Brian Ripley