[R] Scalar vs. vector
Prof Brian Ripley
ripley at stats.ox.ac.uk
Tue Apr 8 14:09:57 CEST 2003
On Mon, 7 Apr 2003, Chris Fehily wrote:
> Do these statements yield identical types of objects?
> x = 3
> y = c(3)
> That is, intrinsically, is x, like y, a vector of length one, but created
> with abbreviated syntax?
Yes. c() is a function which here is doing nothing useful.
> More simply: Are scalars really trivial vectors?
Thare are no scalar variables in S. Since there are vectors of length
zero, those of length one are not `really trivial' in comparison.
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
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