[R] mva - kmeans (repetitive requests)
Prof Brian Ripley
ripley at stats.ox.ac.uk
Mon Dec 18 14:29:10 CET 2000
> Date: Mon, 18 Dec 2000 13:08:20 +0000
> From: Athula Herath <Athula.Herath at ogs.co.uk>
> Hi All,
> Should I get two different results if I were to repeat the kmeans
> clustering on the same data set?
Yes. It starts with a random sample from the dataset.
> In S-Plus (2000) the repetitive executions gives us the same result.
S-PLUS (6.0) uses
# if starting values not specified use hclust to get them
so the algorithm is different.
> Are these results generated by R consistent?
Consistent with what?
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 272860 (secr)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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