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Data Mining
book

Data Mining

by Nong Ye
July 2013
Intermediate to advanced
349 pages
6h 33m
English
CRC Press
Content preview from Data Mining

15

Multidimensional Scaling

Multidimensional scaling (MDS) aims at representing high-dimensional data in a low-dimensional space so that data can be visualized, analyzed, and interpreted in the low-dimensional space to uncover useful data patterns. This chapter describes MDS, software packages supporting MDS, and some applications of MDS with references.

15.1  Algorithm of MDS

We are given n data items in the p-dimensional space, xi = (xi1, …, xip), i = 1, …, n, along with the dissimilarity δij of each pair of n data items, xi and xj, and the rank order of these dissimilarities from the least similar pair to the most similar pair:

δi1j1δi2j2δiMjM

(15.1)

where M denotes the total number of different data pairs, and M = n(n

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Publisher Resources

ISBN: 9781482219364