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# ant0ine/go.mahalanobis

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Naive implementation of the Mahalanobis distance using go.matrix
Go

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### README.txt

```PACKAGE

package mahalanobis
import "github.com/ant0ine/go.mahalanobis"

Naive implementation of the Mahalanobis distance using go.matrix
(https://en.wikipedia.org/wiki/Mahalanobis_distance)

This is me learning Go, it's probably broken, don't use it.

Example:

package main
import (
"fmt"
"github.com/skelterjohn/go.matrix"
"github.com/ant0ine/go.mahalanobis"
)
func main() {
points, err := matrix.ParseMatlab("[1 4 3 4;4 2 3 4]")
if err != nil {
panic(err)
}
fmt.Println("4 points:\n", points)
target, err := matrix.ParseMatlab("[3;4]")
if err != nil {
panic(err)
}
fmt.Println("the target point:\n", target)
distance, err := mahalanobis.Distance(points, target)
if err != nil {
panic(err)
}
fmt.Println("Mahalanobis distance=", distance)
}

FUNCTIONS

func CovarianceMatrix(points *matrix.DenseMatrix) *matrix.DenseMatrix
Return the covariance matrix for this set of points (sample covariance
is used)

func Distance(points, target *matrix.DenseMatrix) (float64, error)
Return the Mahalanobis distance

func DistanceSquare(points, target *matrix.DenseMatrix) (float64, error)
Return the square of the Mahalanobis distance

func MeanVector(points *matrix.DenseMatrix) *matrix.DenseMatrix
Given a set a points, return the mean vector.

```
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