Sketch accuracy is usually measured in terms of Relative Error (RE = Measured/Truth -1). Sketches are stochastic processes and the estimates produced are random ...
Theta Sketch Set Operations Accuracy - Apache DataSketches
datasketches.apache.org › docs › ThetaS...
All set operations (Union, Intersection, Difference) between two sketches A and B must obey the following two rules.
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What is the difference between Theta sketch and HLL sketch?
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Set intersections and differences can have considerably more relative error than a base Theta sketch fed directly with data.
Approximation Over Accuracy: Data Sketches | by Archana Goyal
medium.com › approximation-over-accu...
Mar 11, 2023 · Theta sketch: It estimate the similarity of two datasets by comparing their Jaccard similarity, which is a measure of the overlap between two ...
One more interesting piece of information with theta sketches, you can get 100% accurate results if the number of entries is less than the number of buckets.
Higher size means higher accuracy but more space to store sketches. After you index with a particular size, Druid persists the sketch in segments. At query time ...
HLL and Theta sketches both support approximate distinct counting; however, the HLL sketch produces more accurate results and consumes less storage space. Theta ...
Choosing Desired Relative Error For Theta Sketches · Quick Select Sketch (Default) · Alpha Sketch. Note: These RSE calculations are only valid for an Alpha ...
Apr 12, 2021 · In this article, I will discuss a system AppsFlyer built for the purpose of quickly and accurately finding the approximate sizes of sets of unique users.
Duration: 4:33
Posted: Oct 3, 2024
Posted: Oct 3, 2024