Week 1 Other Cluster methods : how comes that ?

[Yanin Pittayasathornthun]

I don’t understand how comes that d(1,35) = 11?

[Pacharapol Withayasakpunt]

Since we are using complete linkage clustering, the distance between “35” and every other item is the maximum of the distance between this item and 3 and this item and 5.

From the link, at the top of PDF can be found — Defining Cluster Distance: The Linkage Function

Complete linkage, which is more popular, takes the maximum distance.

[Yanin Pittayasathornthun]

Thanks 🙂

[Pimphen Charoen]

Great! Another simple approach to calculate a ‘35’ would be to take an average across attributes, e.g. suppose in the raw data, we have 3 attributes: ID.3 shows 10 20 30, ID.5 shows 2 4 6. Therefore, ID.35 would be 6 12 18. Then you can use this ID.35 to calculate distance matrix again for the next clustering.

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