The Math Behind K-Nearest Neighbors

Why is K-Nearest Neighbors one of the most popular machine-learning algorithms? Let’s understand it by diving into its math, and building it from scratch.

Cristian Leo
Towards Data Science
18 min readFeb 6, 2024

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Image generated by DALL-E

K-Nearest Neighbors is one of the most popular machine-learning algorithms out there. Its simplicity, versatility, and adaptability make it a…

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A Data Scientist with a passion about recreating all the popular machine learning algorithm from scratch.