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Pulled cruft from statistics chapter
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Philip (flip) Kromer
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Feb 7, 2014
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But you don't always need an exact value -- you need actionable insight. There's a clever pattern for approximating the whole by combining carefully re-mixed summaries of the parts, and we'll apply it to | ||
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* Holistic vs algebraic aggregations | ||
* Underflow and the "Law of Huge Numbers" | ||
* Approximate holistic aggs: Median vs remedian; percentile; count distinct (hyperloglog) | ||
* Count-min sketch for most frequent elements | ||
* Approx histogram | ||
- Counting | ||
- total burgers sold - total commits, repos, | ||
- counting a running and or smoothed average | ||
- standard deviation | ||
- sampling | ||
- uniform | ||
- top k | ||
- reservior | ||
- ?rolling topk/reservior sampling? | ||
- algebraic vs holistic aggregate | ||
- use countmin sketch to turn a holistic aggregate into an algebraic aggregate | ||
- quantile or histogram | ||
- numeric stability | ||
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[[machine_learning]] | ||
== Machine Learning | ||
== Machine Learning without Grad School | ||
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