Description Usage Arguments Details Value Author(s) References See Also Examples
Function computes total separation between clusters.
1 | clv.Dis(cluster.center)
|
cluster.center |
|
The definition of total separation between clusters is given by equation:
Dis
= (Dmax/Dmin) * sum{forall i in 1:|C|} 1 /( sum{forall j in 1:|C|} ||vi - vj|| )
where:
|C| | - number of clusters, |
vi, vj | - centers of clusters i and j, |
Dmax | - defined as: max{||vi - vj||: vi,vj - centers of clusters }, |
Dmin | - defined as: min{||vi - vj||: vi,vj - centers of clusters }, |
||x|| | - means: sqrt(x*x'). |
This value is a part of clv.SD
and clv.SDbw
.
As result Dis
value is returned.
Lukasz Nieweglowski
M. Haldiki, Y. Batistakis, M. Vazirgiannis On Clustering Validation Techniques, http://citeseer.ist.psu.edu/513619.html
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Loading required package: cluster
Loading required package: class
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