Date: Thu, 15 Nov 2007 10:01:05 -0600
Reply-To: Melissa Ives <mives@chestnut.org>
Sender: "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From: Melissa Ives <mives@chestnut.org>
Subject: Re: Cluster Analysis
Content-Type: text/plain; charset="us-ascii"
Matthew,
Since the possibilities for various commands can change with versions,
your (and other's) best bet would be to search the SPSS help/syntax help
to see what is possible in your version. So there is between group
(the default) and within group average--your choice.
By typing CLUSTER in a syntax window and then clicking on the Syntax
Help icon, I get:
[/METHOD={BAVERAGE**}[(rootname)] [...]]
{WAVERAGE }
{SINGLE }
{COMPLETE }
{CENTROID }
{MEDIAN }
{WARD }
{DEFAULT** }
Then choosing the "METHOD Subcommand (CLUSTER command)
<mk:@MSITStore:c:\program%20files\spss14\help\main\spsswin.chm::/syn_clu
ster_method.htm> " under Related topics, I get--
METHOD Subcommand (CLUSTER command)
METHOD (subcommand),METHOD (subcommand),METHOD (subcommand)
CLUSTER command,CLUSTER command,CLUSTER command
Hierarchical Cluster Analysis,Hierarchical Cluster Analysis,Hierarchical
Cluster Analysis
methods,methods,methods
METHOD specifies one or more clustering methods.
* If the METHOD subcommand is omitted or included without
specifications, the method of average linkage between groups is used.
* Only one METHOD subcommand can be used, but more than one method
can be specified on it.
* When the number of items is large, CENTROID and MEDIAN require
significantly more CPU time than other methods.
BAVERAGE Average linkage between groups (UPGMA). BAVERAGE is the
default and can also be requested with keyword DEFAULT.
WAVERAGE Average linkage within groups.
SINGLE Single linkage or nearest neighbor.
COMPLETE Complete linkage or furthest neighbor.
CENTROID Centroid clustering (UPGMC). Squared Euclidean
distances are commonly used with this method.
MEDIAN Median clustering (WPGMC). Squared Euclidean distances are
commonly used with this method.
WARD Ward's method. Squared Euclidean distances are commonly used
with this method.
Melissa
-----Original Message-----
From: SPSSX(r) Discussion [mailto:SPSSX-L@LISTSERV.UGA.EDU] On Behalf Of
Pirritano, Matthew
Sent: Thursday, November 15, 2007 1:29 AM
To: SPSSX-L@LISTSERV.UGA.EDU
Subject: [SPSSX-L] Cluster Analysis
Can someone tell me if it is possible to do the average linkage method
in SPSS? I'm getting conflicting reports that you can't or that it is
the same as the centroid method.
Thanks,
Matthew Pirritano, Ph.D.
Assistant Professor of Psychology
Smith Hall 116C
Chapman University
Department of Psychology
One University Drive
Orange, CA 92866
Telephone (714)744-7940
FAX (714)997-6780
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