graph: imported graph as a subtree

graph/ex/fdpclust/main.go

@@ -0,0 +1,75 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/gonum/graph"
+	"github.com/gonum/graph/topo"
+)
+
+func main() {
+	// graph G {
+	G := NewGraphNode(0)
+	// e
+	e := NewGraphNode(1)
+
+	// subgraph clusterA {
+	clusterA := NewGraphNode(2)
+
+	// a -- b
+	a := NewGraphNode(3)
+	b := NewGraphNode(4)
+	a.AddNeighbor(b)
+	b.AddNeighbor(a)
+	clusterA.AddRoot(a)
+	clusterA.AddRoot(b)
+
+	// subgraph clusterC {
+	clusterC := NewGraphNode(5)
+	// C -- D
+	C := NewGraphNode(6)
+	D := NewGraphNode(7)
+	C.AddNeighbor(D)
+	D.AddNeighbor(C)
+
+	clusterC.AddRoot(C)
+	clusterC.AddRoot(D)
+	// }
+	clusterA.AddRoot(clusterC)
+	// }
+
+	// subgraph clusterB {
+	clusterB := NewGraphNode(8)
+
+	// d -- f
+	d := NewGraphNode(9)
+	f := NewGraphNode(10)
+	d.AddNeighbor(f)
+	f.AddNeighbor(d)
+	clusterB.AddRoot(d)
+	clusterB.AddRoot(f)
+	// }
+
+	// d -- D
+	d.AddNeighbor(D)
+	D.AddNeighbor(d)
+
+	// e -- clusterB
+	e.AddNeighbor(clusterB)
+	clusterB.AddNeighbor(e)
+
+	// clusterC -- clusterB
+	clusterC.AddNeighbor(clusterB)
+	clusterB.AddNeighbor(clusterC)
+
+	G.AddRoot(e)
+	G.AddRoot(clusterA)
+	G.AddRoot(clusterB)
+	// }
+
+	if !topo.IsPathIn(G, []graph.Node{C, D, d, f}) {
+		fmt.Println("Not working!")
+	} else {
+		fmt.Println("Working!")
+	}
+}