2021-08-19 14:24:30 +02:00
|
|
|
package clusters
|
|
|
|
|
|
|
|
import (
|
|
|
|
"reflect"
|
|
|
|
"testing"
|
|
|
|
)
|
|
|
|
|
|
|
|
func TestDBSCANCluster(t *testing.T) {
|
|
|
|
tests := []struct {
|
|
|
|
MinPts int
|
|
|
|
Eps float64
|
|
|
|
Points [][]float64
|
|
|
|
Expected []int
|
|
|
|
}{
|
|
|
|
{
|
|
|
|
MinPts: 1,
|
|
|
|
Eps: 1,
|
|
|
|
Points: [][]float64{{1}},
|
|
|
|
Expected: []int{1},
|
|
|
|
},
|
|
|
|
{
|
|
|
|
MinPts: 1,
|
|
|
|
Eps: 1,
|
|
|
|
Points: [][]float64{{1}, {1.5}},
|
|
|
|
Expected: []int{1, 1},
|
|
|
|
},
|
|
|
|
{
|
|
|
|
MinPts: 1,
|
|
|
|
Eps: 1,
|
|
|
|
Points: [][]float64{{1}, {1}},
|
|
|
|
Expected: []int{1, 1},
|
|
|
|
},
|
|
|
|
{
|
|
|
|
MinPts: 1,
|
|
|
|
Eps: 1,
|
|
|
|
Points: [][]float64{{1}, {1}, {1}},
|
|
|
|
Expected: []int{1, 1, 1},
|
|
|
|
},
|
|
|
|
{
|
|
|
|
MinPts: 1,
|
|
|
|
Eps: 1,
|
|
|
|
Points: [][]float64{{1}, {1.5}, {2}},
|
|
|
|
Expected: []int{1, 1, 1},
|
|
|
|
},
|
|
|
|
{
|
|
|
|
MinPts: 1,
|
|
|
|
Eps: 1,
|
|
|
|
Points: [][]float64{{1}, {1.5}, {3}},
|
|
|
|
Expected: []int{1, 1, 2},
|
|
|
|
},
|
|
|
|
{
|
|
|
|
MinPts: 2,
|
|
|
|
Eps: 1,
|
|
|
|
Points: [][]float64{{1}, {3}},
|
|
|
|
Expected: []int{-1, -1},
|
|
|
|
},
|
|
|
|
}
|
|
|
|
for _, test := range tests {
|
2022-04-03 17:25:37 +02:00
|
|
|
c, e := DBSCAN(test.MinPts, test.Eps, 0, EuclideanDist)
|
2021-08-19 14:24:30 +02:00
|
|
|
if e != nil {
|
|
|
|
t.Errorf("Error initializing kmeans clusterer: %s\n", e.Error())
|
|
|
|
}
|
|
|
|
|
|
|
|
if e = c.Learn(test.Points); e != nil {
|
|
|
|
t.Errorf("Error learning data: %s\n", e.Error())
|
|
|
|
}
|
|
|
|
|
|
|
|
if !reflect.DeepEqual(c.Guesses(), test.Expected) {
|
|
|
|
t.Errorf("guesses does not match: %d vs %d\n", c.Guesses(), test.Expected)
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|