blog/content/posts/2024-08-02-reservoir-sampling/index.md

title	date	draft	description	tags	categories	series	favorite	disable_feed	mathjax
Reservoir Sampling	2024-08-02T18:30:56+01:00	false	Elegantly sampling a stream	algorithms python	programming	Cool algorithms	false	false	true

Reservoir Sampling is an online, probabilistic algorithm to uniformly sample k random elements out of a stream of values.

It's a particularly elegant and small algorithm, only requiring $\Theta(k)$ amount of space and a single pass through the stream.