Date:         Wed, 21 Sep 2005 18:49:59 +0530
Reply-To:     Deepak Jethwani <deepak.jethwani@gmail.com>
Sender:       "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From:         Deepak Jethwani <deepak.jethwani@gmail.com>
Subject:      2nd Attempt: Grouping Zip Codes
Content-Type: text/plain; charset=ISO-8859-1

Hi Listers,
 This is my second mail to the list. I am still struggling with the
following issue.
 We have a list of zip codes and a table that lists out the drive time
distance from one zip code to the other in the following format.

Zip1 Zip2 Zip3 .....
Zip1 0 5 15
Zip2 5 0 12
Zip3 15 12 0
Zip4



Now, we need to group the zip codes which fall within 10 minutes of drive
time distance from a zip code into a group.
 The problem is actually about identifying starting zip codes around which
to build these groupings.

I would really welcome any comments from anyone who has faced a similar
problem or any suggested approaches that come to mind for a possible
solution or any suggested texts which I can use to tackle this problem.

Best regards
 Deepak Jethwani