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ISAAC
2009
Springer

Worst-Case and Smoothed Analysis of k-Means Clustering with Bregman Divergences

10 years 12 days ago
Worst-Case and Smoothed Analysis of k-Means Clustering with Bregman Divergences
The k-means algorithm is the method of choice for clustering large-scale data sets and it performs exceedingly well in practice. Most of the theoretical work is restricted to the case that squared Euclidean distances are used as similarity measure. In many applications, however, data is to be clustered with respect to other measures like, e.g., relative entropy, which is commonly used to cluster web pages. In this paper, we analyze the running-time of the k-means method for Bregman divergences, a very general class of similarity measures including squared Euclidean distances and relative entropy. We show that the exponential lower bound known for the Euclidean case carries over to almost every Bregman divergence. To narrow the gap between theory and practice, we also study k-means in the semi-random input model of smoothed analysis. For the case that n data points in Rd are perturbed by noise with standard deviation σ, we show that for almost arbitrary Bregman divergences the expected...
Bodo Manthey, Heiko Röglin
Added 26 May 2010
Updated 26 May 2010
Type Conference
Year 2009
Where ISAAC
Authors Bodo Manthey, Heiko Röglin
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