How could I enlarge the number of cluster(o-cluster)

when I make the model build in DM Oracle9i
the option of clustering is defalut
(sensitivity 0.5 and max cluster number 10)
then o-cluster makes clusters 20 clusters and leaf cluster is 10
but I want to make more detail(large) cluster..
so, I increase the sensitivity 1.0F and max cluster number 20 then o-cluster make the same result.
How could I solve this problem?

O-Cluster will only return as many clusters it is supported by the data. For example, suppose the data is a bundled together in a single region. O-Cluster will only return a single cluster even if you bump up the max number of clusters. The max number of cluster only limits the number of cluster (leaves) O-Cluster will return. It doesn't force it to return that number of clusters. Increasing the sensitivity will make O-Cluster return smaller clusters (case they exist).
In summary there is no mechanism to force O-Cluster to make more clusters if it doesn't find that the data supports a larger number of clusters. If you would like to get a specific number of cluster or to explicitly control how many clusters are returned, K-Means is a better suited for this.
--Marcos

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