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tdigest's Introduction

tdigest

This is an implementation of Ted Dunning's t-digest in Go.

The implementation is based off Derrick Burns' C++ implementation.

Example

package main

import (
	"log"

	"github.com/tidepool-org/tdigest"
)

func main() {
	td := tdigest.NewWithCompression(1000)
	for _, x := range []float64{1, 2, 3, 4, 5, 5, 4, 3, 2, 1} {
		td.Add(x, 1)
	}

	// Compute Quantiles
	log.Println("50th", td.Quantile(0.5))
	log.Println("75th", td.Quantile(0.75))
	log.Println("90th", td.Quantile(0.9))
	log.Println("99th", td.Quantile(0.99))

	// Compute CDFs
	log.Println("CDF(1) = ", td.CDF(1))
	log.Println("CDF(2) = ", td.CDF(2))
	log.Println("CDF(3) = ", td.CDF(3))
	log.Println("CDF(4) = ", td.CDF(4))
	log.Println("CDF(5) = ", td.CDF(5))
}

tdigest's People

Contributors

nathanielc avatar goller avatar derrickburns avatar ianwilkes avatar aviau avatar dim avatar

Watchers

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