AW: [R] Question

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From: TEMPL Matthias (Matthias.Templ@statistik.gv.at)
Date: Wed 26 May 2004 - 20:47:33 EST


Message-id: <83536658864BC243BE3C06D7E936ABD50153A5AE@xchg1.statistik.local>

A small comment:
The code of Agnes is written in Fortran. Following book give more details:

     Kaufman, L. and Rousseeuw, P.J. (1990). _Finding Groups in Data:
     An Introduction to Cluster Analysis_. Wiley, New York.

The 'hclust' function is based an Algorithm contributed to STATLIB
by F. Murtagh and the code is written in C.

Probably the differences between agnes and hclust causes from the different code and the different implementation.

Matthias

> -----Ursprüngliche Nachricht-----
> Von: n.bouget [mailto:n.bouget@laposte.net]
> Gesendet: Dienstag, 25. Mai 2004 09:39
> An: R-help
> Betreff: [R] Question
>
>
> [R]:Agnes vs Hclust
>
> Hi,
> I want to know if there is a difference between the two
> hierarchical methods Agnes and hclust when there are used
> with the same method and the same metric on the same data! I
> ask this question because I've got a difference, the clusters
> are not the same even if there are some similarities... Is
> anybody know why i have this difference? Thanks Nicolas BOUGET
>
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