Past Meetup

Hokusai — Sketching Streams in Real Time

This Meetup is past

18 people went

Dev Bootcamp

351 W. Hubbard, Suite 700 · Chicago, IL

How to find us

7th floor, to the left when you exit the elevator

Location image of event venue


The Paper:
A description of 北斎 Hokusai, a real time system which is able to capture frequency information for streams of arbitrary sequences of symbols. The algorithm uses the CountMin sketch as its basis and exploits the fact that sketching is linear. It provides real time statistics of arbitrary events, e.g. streams of queries as a function of time. We use a factorizing approximation to provide point estimates at arbitrary (time, item) combinations. Queries can be answered in constant time.

The Speaker:
Hailing from Brooklyn, Shaker is a crazy-looking dude who engineers crazy things at Belly (previously, The Onion). He’s sometimes on The Twitter, so Twitter at him at

6:00-6:30 Food and Socializing
6:30-7:30 Presentation and Discussion