k-means聚類中的Jaccard

Question

在Cypher中，如何修改k-means來考慮Jaccard距離Dj而不是歐幾里得距離？

在哪裏的Jaccard距離被定義爲了Dj = 1-（|A∩B|）/（|A∪B|）

Answer 1

下面是如何計算與CYPHER（從Recommendations Neoj Sandbox）的Jaccard距離的例子：

MATCH (m:Movie {title: "Inception"})-[:IN_GENRE]->(g:Genre)<-[:IN_GENRE]-(other:Movie) 
WITH m, other, COUNT(g) AS intersection, COLLECT(g.name) AS i 
MATCH (m)-[:IN_GENRE]->(mg:Genre) 
WITH m,other, intersection,i, COLLECT(mg.name) AS s1 
MATCH (other)-[:IN_GENRE]->(og:Genre) 
WITH m,other,intersection,i, s1, COLLECT(og.name) AS s2 
WITH m,other,intersection,s1,s2 
WITH m,other,intersection,s1+filter(x IN s2 WHERE NOT x IN s1) AS union, s1, s2 
RETURN m.title, other.title, s1,s2,((1.0*intersection)/SIZE(union)) AS jaccard ORDER BY jaccard DESC LIMIT 100 

一旦你計算出你可以使用它與你的k-means算法。你如何運行k-means？還在Cypher中？