func ExampleDistanceMatrix_Ultrametric() {
d := cluster.DistanceMatrix{
{0, 20, 17, 11},
{20, 0, 20, 13},
{17, 20, 0, 10},
{11, 13, 10, 0},
}
pl, ul := d.Ultrametric(cluster.DAVG)
fmt.Println("node leaves parent weight age")
for n, p := range pl.Paths {
fmt.Printf(">%3d %3d %3d %6.3f %6.3f\n",
n, p.Len, p.From, ul[n].Weight, ul[n].Age)
}
// Output:
// node leaves parent weight age
// > 0 1 5 7.000 0.000
// > 1 1 6 8.833 0.000
// > 2 1 4 5.000 0.000
// > 3 1 4 5.000 0.000
// > 4 2 5 2.000 5.000
// > 5 3 6 1.833 7.000
// > 6 4 -1 NaN 8.833
}
