This website uses Cookies. Click Accept to agree to our website's cookie use as described in our Privacy Policy. Click Preferences to customize your cookie settings.
Accept
Reject
Preferences
cancel
Turn on suggestions
Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results for 
Show  only  | Search instead for 
Did you mean: 
Submit your abstract to the call for content for Discovery Summit Americas by April 23. Selected abstracts will be presented at Discovery Summit, Oct. 21- 24.
Discovery is online this week, April 16 and 18. Join us for these exciting interactive sessions.
Choose Language Hide Translation Bar
jessez
jessez
Level I

Kmeans Clustering CCC problem

Oct 20, 2014 03:17 PM (8624 views)

JMP Kmeans clustering is not calculating a CCC statistic for a subset of my data. I have a data file with a little over 4000 unique sites. Using this data set I have successfully used kmeans clustering and JMP displays a CCC statistic. I created a subset of this data using a variable and now have two new data tables (one with around 200 rows and the other with 4000+). Whenever I go through the same kmeans clustering process on the larger subset of the data JMP will not spit out a CCC statistic. Any ideas about what is going on here?

0 Kudos
1 ACCEPTED SOLUTION

Accepted Solutions
jessez
jessez
Level I
Solution

Re: Kmeans Clustering CCC problem

Oct 20, 2014 04:33 PM (11202 views)  |  Posted in reply to message from jessez 10-20-2014

After a couple hours (and you will see they were wasted hours...) of trying to figure this out I caught the problem. One of the variables I used in the clustering process was zero for most of the data set. It turns out that it was zero for all of the rows in the subset I was interested in using Kmeans clustering. The zero values blow up the CCC. Problem solved.

View solution in original post

2 REPLIES 2
jessez
jessez
Level I
Solution

Re: Kmeans Clustering CCC problem

Oct 20, 2014 04:33 PM (11203 views)  |  Posted in reply to message from jessez 10-20-2014

After a couple hours (and you will see they were wasted hours...) of trying to figure this out I caught the problem. One of the variables I used in the clustering process was zero for most of the data set. It turns out that it was zero for all of the rows in the subset I was interested in using Kmeans clustering. The zero values blow up the CCC. Problem solved.

chitra
chitra
Level I

Re: Kmeans Clustering CCC problem

Mar 24, 2017 06:20 PM (8337 views)  |  Posted in reply to message from jessez 10-20-2014

Just wondering how you solved this problem. Did yo ujust remove that attribute? I am facing the same situation where almost all of my columns have a large number of 0s, but since they are significant for my analysis I want to include them in my analysis.

0 Kudos