your algorithm doesn't take into account that a new point can connect two previously unconnected clusters.

For instance, with $scale = 1.0, the points (1.0, 0) (2.5, 0) (1.8, 0) will not be classified in the same cluster.

In reply to Re^5: fastest way to compare numerical strings? (300_000 points in under 4 minutes!) by salva
in thread fastest way to compare numerical strings? by Anonymous Monk

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