I believe it is a shortcut to use an existing software to test different algorithms, though eventually I have to implement the most suitable one by myself. What you told are very helpful. Thank you so much.
-Kevin ----- Original Message ----- From: "Art Kendall" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Friday, September 15, 2006 3:46 PM Subject: Re: clustering with distance matrix as input > Are you looking for existing software that does different kinds of > hierarchical clustering? (different ways of deciding which pair of cases > to combine.) > SPSS, SAS, Visual Numerics, NTCLUST, PYTHON SCILIB, etc., etc. already > have a wide variety of approaches. > There are also many single algorithm programs. > > Are you looking for algorithms that you can implement in new software? > > go to www.spss.com/support > click <login to online tech support> (left pane) > click <login> (main pane) > login as "guest" password "guest" click "ok" > click <statistics documentation> (left pane) > click <algorithms> (main pane) > click <proximities> to see how a few dozen proximity/distance > coefficients can be created. > click <cluster> to see about several kinds of hierarchical clustering > click <TWOSTEP> to see about a nonhierarchical method > click <quick cluster> to see about k-means clustering. This is a much > older method than TWOSTEP. > > Hope this helps. If it does not meet your needs, please give more > detail about what you woud like to do. > > Art Kendall > Social Research Consultants > > Kejun (Kevin) Mei wrote: > > >Can someone please tell me a clustering method that use > >a distance matrix as input? I tried implementing the Ward > >method, but found the final clusters are not so good in my > >application, when I trace how clusters are grouped and > >how cluster centers are updated. I am seeking an improved > >version of the Ward method, or any others. > > > >Thank you so much and have a great weekend. > > > >-Kevin > > > >---------------------------------------------- > >CLASS-L list. > >Instructions: http://www.classification-society.org/csna/lists.html#class-l > > > > > > > > > > ---------------------------------------------- > CLASS-L list. > Instructions: http://www.classification-society.org/csna/lists.html#class-l ---------------------------------------------- CLASS-L list. Instructions: http://www.classification-society.org/csna/lists.html#class-l
