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Likelihood-based data squashing: A modeling approach to instance construction. (English) Zbl 0996.68564

Summary: Squashing is a lossy data compression technique that preserves statistical information. Specifically, squashing compresses a massive dataset to a much smaller one so that outputs from statistical analyses carried out on the smaller (squashed) dataset reproduce outputs from the same statistical analyses carried out on the original dataset. Likelihood-based Data Squashing (LDS) differs from a previously published squashing algorithm insofar as it uses a statistical model to squash the data. The results show that LDS provides excellent squashing performance even when the target statistical analysis departs from the model used to squash the data.

MSC:

68U99 Computing methodologies and applications
68P05 Data structures

Software:

R
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