Data Mining (77 page)

Read Data Mining Online

Authors: Mehmed Kantardzic

Within-cluster variations, after initial random distribution of samples, are

And the total square-error is

When we reassign all samples, depending on a minimum distance from centroids M
1
and M
2
, the new redistribution of samples inside clusters will be

New clusters C
1
= {x
1
, x
2
, x
3
} and C
2
= {x
4
, x
5
} have new centroids

The corresponding within-cluster variations and the total square-error are

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