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Affirmative Sampling: Theory and Applications

Authors Jérémie Lumbroso , Conrado Martínez

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Author Details

Jérémie Lumbroso
  • Department of Computer Science, Princeton University, NJ, USA
Conrado Martínez
  • Department of Computer Science, Universitat Politècnica de Catalunya, Barcelona, Spain

Funding

This work has been supported by funds from the MOTION Project (Project PID2020-112581GB-C21) of the Spanish Ministry of Science & Innovation MCIN/AEI/10.13039/501100011033, and by Princeton University, and its Department of Computer Science.

Acknowledgements

We want to thank the anonymous reviewers who carefully read the submitted article and made very useful remarks and suggested changes which have allowed us to improve the paper and correct a couple of flawed arguments.

Cite As Get BibTex

Jérémie Lumbroso and Conrado Martínez. Affirmative Sampling: Theory and Applications. In 33rd International Conference on Probabilistic, Combinatorial and Asymptotic Methods for the Analysis of Algorithms (AofA 2022). Leibniz International Proceedings in Informatics (LIPIcs), Volume 225, pp. 12:1-12:17, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2022) https://doi.org/10.4230/LIPIcs.AofA.2022.12

Abstract

Affirmative Sampling is a practical and efficient novel algorithm to obtain random samples of distinct elements from a data stream. Its most salient feature is that the size S of the sample will, on expectation, grow with the (unknown) number n of distinct elements in the data stream. As any distinct element has the same probability to be sampled, and the sample size is greater when the "diversity" (the number of distinct elements) is greater, the samples that Affirmative Sampling delivers are more representative than those produced by any scheme where the sample size is fixed a priori - hence its name. Our algorithm is straightforward to implement, and several implementations already exist.

Subject Classification

ACM Subject Classification
  • Theory of computation → Data structures design and analysis
  • Theory of computation → Design and analysis of algorithms
  • Theory of computation → Sketching and sampling
Keywords
  • Data streams
  • Distinct sampling
  • Random sampling
  • Cardinality estimation
  • Analysis of algorithms

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