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A simple algorithm for finding frequent elements in streams and bags
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Source ACM Transactions on Database Systems (TODS) archive
Volume 28 ,  Issue 1  (March 2003) table of contents
Pages: 51 - 55  
Year of Publication: 2003
ISSN:0362-5915
Authors
Richard M. Karp  International Computer Science Institute and University of California, Berkeley, California
Scott Shenker  International Computer Science Institute and University of California, Berkeley, California
Christos H. Papadimitriou  University of California, Berkeley, California
Publisher
ACM  New York, NY, USA
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ABSTRACT

We present a simple, exact algorithm for identifying in a multiset the items with frequency more than a threshold θ. The algorithm requires two passes, linear time, and space 1/θ. The first pass is an on-line algorithm, generalizing a well-known algorithm for finding a majority element, for identifying a set of at most 1/θ items that includes, possibly among others, all items with frequency greater than θ.


REFERENCES

Note: OCR errors may be found in this Reference List extracted from the full text article. ACM has opted to expose the complete List rather than only correct and linked references.

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Pan, R., Breslau, L., Prabhakar, B., and Shenker, S. Approximate fairness through differential dropping. preprint, 2001.

CITED BY  52

Collaborative Colleagues:
Richard M. Karp: colleagues
Scott Shenker: colleagues
Christos H. Papadimitriou: colleagues