It is one of the methods available in SPSS.
just specify
    /method = ward
on the CLUSTER procedure.

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shannon wrote:

>Is code available to implement Ward's method in S-Plus?
>William D. Shannon, Ph.D.
>Assistant Professor of Biostatistics in Medicine
>Division of General Medical Sciences and Biostatistics
>Washington University School of Medicine
>Campus Box 8005, 660 S. Euclid
>St. Louis, MO   63110
>Phone: 314-454-8356
>Fax: 314-454-5113
>e-mail: [log in to unmask]
>web page: