I'm using PASWStatistics18 and K-Means clustering data that I'd previously clustered using an earlier version of SPSS... My problem is that I'm getting different cluster results depending on how the data file is sorted. I can't remember this being an issue in the earlier versions of SPSS, but I can't repeat the same results, using the same data file, again! Only by using the saved cluster centres can I get close to the original result.
Have others had similar isues? Am I doing something wrong?