K-means function as a user-defined window function in PostgreSQL
C Perl
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data Initial May 20, 2011
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kmeans.c
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test_xy.sql
uninstall_kmeans.sql

README.md

kmeans-postgresql

This module implements k-means clustering algorithm in PostgreSQL. It is a truly user-defined window function out of builtin functions, written in C.

Designed for PostgreSQL 8.4+

Hitoshi Harada