2D fellows

Dear Liem!

Hello everybody,


I would like to perform some treatments on a group. Each element of my
group is a 2D array. They all have the same dimensions.

I don't know what you mean exactly by a "2D-array", I would think first of
something you could easily convert to a matrix, or a data frame! (I just had a
look on "Notes on R" and the description of arrays there confirms my belief
about the convertion.)

I would like to know if I can find in R some functions like "dist" (base
package), "hclust" and "kmeans" (mva package) but in order to use 2D
arrays more than vectors. 

Well, if you could convert your arrays into vectors (via matrix or data frame
 if you want to) and collect them in a data frame you could use these functions.
If you need a special distance you could program a function in which you compute
the pairwise distances and write them to a dissimilarity matrix as in the
package cluster. For a description see the documentation there (or just type
daisy after loading the package cluster). With this you could use the functions
diana for divisive hierarchical
clustering, agnes for agglomerative nesting or for k-means pam. 

I hope this helps,

yours Winfried Theis
----------------------------------
E-Mail: Winfried Theis <theis at statistik.uni-dortmund.de>
Date: 16-May-00
Tel.: +49-231-755-5903                  Room: Mathematikgebäude, M832
Dipl.-Math. Winfried Theis, Graduiertenkolleg "Angewandte Statistik",
Universität Dortmund, 44221 Dortmund
----------------------------------
-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-
r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html
Send "info", "help", or "[un]subscribe"
(in the "body", not the subject !)  To: r-help-request at stat.math.ethz.ch
_._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._