1
$\begingroup$

It is known that the results of hierarchical agglomerative clustering using single-link method in order to determine the inter-cluster distance suffer form the chain-effect (natural clusters tend to extend trough a line of few points, like in the image below).

Does centroid-linkage have the same disadvantage?

enter image description here

$\endgroup$
2
$\begingroup$

The potential worst cases of centroid linkage are probably too crazy to explain as easy as the single-link effect... To see how it reacts to the classic Single-Link problem, why don't you just try yourself?

Roughly, because of the way centroid linkage works, it may end up using a virtual cluster center that is outside of the actual cluster. You then may see some very weird links to happen. That is also why it can have non-monotone linkage levels (so later merges may be cheaper than earlier merges).

| improve this answer | |
$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.