17_HierarchicalClustering.pdf - IAML&Hierarchical&Clustering Victor&Lavrenko&and&Nigel&Goddard School&of&Informa?cs Semester&1 Hierarchical&clustering

# 17_HierarchicalClustering.pdf -...

• 8

This preview shows page 1 - 8 out of 8 pages.

IAML: Hierarchical Clustering Victor Lavrenko and Nigel Goddard School of Informa?cs Semester 1

Subscribe to view the full document.

Copyright © 2014 Victor Lavrenko Hierarchical clustering
Copyright © 2014 Victor Lavrenko Hierarchical KHmeans

Subscribe to view the full document.

Copyright © 2014 Victor Lavrenko Agglomera?ve clustering
Copyright © 2014 Victor Lavrenko Agglomera?ve clustering: example e a g b c d f h i j k l m n a b c d e f g h i j k m n l Dendrogram distance threshold number of clusters

Subscribe to view the full document.

Copyright © 2014 Victor Lavrenko Cluster distance measures D ( c 1 , c 2 ) = 1 | c 1 | 1 | c 2 | D ( x 1 , x 2 ) x 2 c 2 x 1 c 1
Copyright © 2014 Victor Lavrenko D = {D

Subscribe to view the full document.

Unformatted text preview: i,j : distance between x i and x j for i,j=1..N} • for N itera?ons: i,j = arg min D i,j … pair of closest clusters add cluster: i+j, delete clusters i, j for each remaining cluster k: LanceHWilliams Algorithm D k,i+j = α i D k,i + α j D k,j + β D i,j + γ |D k,i H D k,j | Single link: D k,i+j = ½ (D ki + D kj- |D ki-D kj |) = min {D ki , D kj } min a,b = max a,b- |a-b| k i j i+j D k,j D k,i D i,j Copyright © 2014 Victor Lavrenko Summary...
View Full Document

• Fall '12
• CharlesSutton

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern

Ask Expert Tutors You can ask You can ask ( soon) You can ask (will expire )
Answers in as fast as 15 minutes