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Can you elaborate on how you merge clusters? Many times a clusters will be just single-doc clusters, how to check if you need to merge two single-doc clusters?
by felipehummel 14y ago
Can you elaborate on how you merge clusters? Many times a clusters will be just single-doc clusters, how to check if you need to merge two single-doc clusters? (it seems like the same process that was done in the first place to create the clusters: doc x doc similarity)
- jrfinkel 14y agoMerging is pretty simple, and could probably use a little more TLC. The way we do it is that when we get a new document in the system, if the similarity score is above some threshold for documents in two different clusters we will consider merging those clusters. We then make the yes/no decision by comparing random documents from both clusters and averaging the scores, but the threshold we use here is a bit lower than the non-merging decisions (since we have the additional information of this new document doing a good job of linking the clusters).
- lookforr 14y agothis doesn't work in the case where there are two (and only two) similar documents get ingested into the system as new singleton clusters at the same time; this case is very rare so it is not a big issue to you, i guess.