Date: Thu, 17 May 2007 20:25:28 -0700
Reply-To: David L Cassell <davidlcassell@MSN.COM>
Sender: "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From: David L Cassell <davidlcassell@MSN.COM>
Subject: Re: Clustering using SAS
Content-Type: text/plain; format=flowed
>I have a question about clustering in SAS,
>I have 14 attributes, 25 observations, I want to cluster them, I dont have
>much preference about type of clustering (K-means, Hierarchial) etc.
>My only concern is that I want the clusters made so that 1st cluster has 5
>members and the second cluster the remaining 20 members,
>Can anyone please guide me whether this is possible and if so is it a good
>practice to do such a procedure?
I would say that this is not possible.
Now, if you have further information, such as "these represent 25 skeletons,
an unspecified set of 5 of whom have characteristics that should mark them
as hominid, while the others are not" that would help. And it would explain
why you think you should get 5 and 20.
But without further information, I can't see how you can think that
your data would reasonably aggregate into sets of 5 and 20.
If your data have features which are clear, then *any* technique ought to
find them. Although I would skip clustering methods like Ward's which
tend to try to lump the data into equal-sized clusters...
David L. Cassell
3115 NW Norwood Pl.
Corvallis OR 97330
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