Efficient sparse spherical k-means for document clustering

  title={Efficient sparse spherical k-means for document clustering},
  author={Johannes Knittel and Steffen Koch and Thomas Ertl},
  journal={Proceedings of the 21st ACM Symposium on Document Engineering},
Spherical k-Means is frequently used to cluster document collections because it performs reasonably well in many settings and is computationally efficient. However, the time complexity increases linearly with the number of clusters k, which limits the suitability of the algorithm for larger values of k depending on the size of the collection. Optimizations targeted at the Euclidean k-Means algorithm largely do not apply because the cosine distance is not a metric. We therefore propose an… 

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