Hi,
Unfortunately, a predecessor, who died last year, did just this - so now
I'm expected to do it. I suspected that I would have to run the whole
all over again. This is perhaps what he did. Oh, well - I had to ask.
Thanks,
Walt
Nick Cox wrote:
> I can't see that the request makes any sense.
>
> You might as well say "Last year, I calculated averages for the client,
> and the client was happy. Now the client has new data and wants new
> averages except that the old averages should be used in constructing
> them." You must choose: old or new or both.
>
> All you can do is apply the same method to the new data, and that takes
> no cognisance of the old data. In fact, the new clustering might be some
> sort of check on the old, except that it may be too late for the client.
>
>
> There are variants on this such as combining old and new datasets.
>
> It could be different, although not necessarily a better idea, for a
> method such as -pca-, which leaves pertinent results in its wake.
>
> Nick
> [email protected]
>
> Data Analytics Corp.
>
> Last year, I developed a simple three-cluster solution for a client
> based on survey data using the following:
>
> cluster wardslinkage q16r6 q17r5 q17r7 q17aa1r1 q17ab1r1 q17ab1r7
> q17ab1r9 vytldl, measure(Gower) name(clus01);
> cluster dendrogram clus01, xlabel(, angle(90) labsize(*0.75))
> cutnumber(30) title("Wave 17 Cluster Analysis")
> note("Notes:" "Based on Wards linkage" "062209_1 cluster.do");
> cluster gen g = group(3), name(clus01);
>
> The client was happy. Now this year, the client redid the survey but
> wants to use the same cluster solution as last year, only with the data
> from the new survey. How do I use the previous solution with new data?
>
> I have both Stata 10 and 11 for Windows.
>
>
> *
> * For searches and help try:
> * http://www.stata.com/help.cgi?search
> * http://www.stata.com/support/statalist/faq
> * http://www.ats.ucla.edu/stat/stata/
>
>
--
________________________
Walter R. Paczkowski, Ph.D.
Data Analytics Corp.
44 Hamilton Lane
Plainsboro, NJ 08536
________________________
(V) 609-936-8999
(F) 609-936-3733
[email protected]
www.dataanalyticscorp.com
*
* For searches and help try:
* http://www.stata.com/help.cgi?search
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
