What do you mean by 'lenght'? It is part of the definition that the
coefficient vector has Euclidean length one: a principal component is
a projection. See for example MASS p.302.
I don't see anything that has length 1 in the R sense.
On Wed, 16 Jun 2010, Atte Tenkanen wrote:
Hi,
I would like to know whether there is some deeper rationale behind
or is it just an established practice that the lenghts of principal
components, giving for example by prcomp-function, are normalised to
1?
Best regards,
Atte Tenkanen
University of Turku, Finland
Department of Musicology
+35823335278
http://users.utu.fi/attenka/
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