Message-ID: <alpine.LFD.2.00.0901060850590.7994@auk.stats.ox.ac.uk>
Date: 2009-01-06T09:02:12Z
From: Brian Ripley
Subject: prblem with NA
In-Reply-To: <OFD39B0CF2.D6FD233C-ONC1257536.002BE81E-C1257536.002C0432@precheza.cz>
On Tue, 6 Jan 2009, Petr PIKAL wrote:
[...]
> Logical vectors can be treated like numeric with TRUE=1 and FALSE=0,
More accurately, 'like integer' ('numeric' often means 'double').
> I learned that somewhere but it is not mentioned in help page for
> ?logical so it is not so easy to find.
Hmm: it *is* in 'An Introduction to R'.
--
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