[R] Different results in different runs with identical parameters in CLARA

From: Amir Safari <amsa36060_at_yahoo.com>
Date: Fri 10 Jun 2005 - 20:13:06 EST

   

Dear All R Friends,
When I run my data in any time with the below codes, I receive different results. My data , k , samples, trace are identical in any run.  

 c<- clara(mydata,4, metric= " euclidean " , stand= TRUE, samples=5 , trace=3, keep.data=TRUE , rngR=TRUE)  

result of first try:
Average silhouette width per cluster: 0.5881658 result of second try:
Average silhouette width of best sample: 0.6294549 result of third try:
Average silhouette width of best sample: 0.6609939 ...
I think that only best sample changes in any run. The question is here:
Which try ( or run) is optimal? How many try do I need to achive to optimal case? Is it reliable ? Best Regards,
Amir      


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