Examples with Graph org.gephi.graph.api.Graph used on opensource projects

Example 86 with Graph

use of org.gephi.graph.api.Graph in project gephi by gephi.

the class GraphDensityNGTest method testOneNodeDensity.

@Test
public void testOneNodeDensity() {
    GraphModel graphModel = GraphGenerator.generateNullUndirectedGraph(1);
    Graph graph = graphModel.getGraph();
    GraphDensity d = new GraphDensity();
    double density = d.calculateDensity(graph, false);
    assertEquals(density, Double.NaN);
}

Example 87 with Graph

use of org.gephi.graph.api.Graph in project gephi by gephi.

the class GraphDensityNGTest method testCompleteGraphWithSelfLoopsDensity.

@Test
public void testCompleteGraphWithSelfLoopsDensity() {
    GraphModel graphModel = GraphGenerator.generateCompleteUndirectedGraph(3);
    UndirectedGraph undirectedGraph = graphModel.getUndirectedGraph();
    Node n1 = undirectedGraph.getNode("0");
    Node n2 = undirectedGraph.getNode("1");
    Node n3 = undirectedGraph.getNode("2");
    Edge currentEdge = graphModel.factory().newEdge(n1, n1, false);
    undirectedGraph.addEdge(currentEdge);
    currentEdge = graphModel.factory().newEdge(n2, n2, false);
    undirectedGraph.addEdge(currentEdge);
    currentEdge = graphModel.factory().newEdge(n3, n3, false);
    undirectedGraph.addEdge(currentEdge);
    Graph graph = graphModel.getGraph();
    GraphDensity d = new GraphDensity();
    double density = d.calculateDensity(graph, false);
    assertEquals(density, 2.0);
}

Example 88 with Graph

use of org.gephi.graph.api.Graph in project gephi by gephi.

the class GraphDensityNGTest method testTwoConnectedNodesDensity.

@Test
public void testTwoConnectedNodesDensity() {
    GraphModel graphModel = GraphGenerator.generateCompleteUndirectedGraph(2);
    Graph graph = graphModel.getGraph();
    GraphDensity d = new GraphDensity();
    double density = d.calculateDensity(graph, false);
    assertEquals(density, 1.0);
}

Example 89 with Graph

use of org.gephi.graph.api.Graph in project gephi by gephi.

the class GraphDensityNGTest method testNullGraphDensity.

@Test
public void testNullGraphDensity() {
    GraphModel graphModel = GraphGenerator.generateNullUndirectedGraph(5);
    Graph graph = graphModel.getGraph();
    GraphDensity d = new GraphDensity();
    double density = d.calculateDensity(graph, false);
    assertEquals(density, 0.0);
}

Example 90 with Graph

use of org.gephi.graph.api.Graph in project gephi by gephi.

the class GraphDensityNGTest method testTwoCompleteGraphsDensity.

@Test
public void testTwoCompleteGraphsDensity() {
    GraphModel graphModel = GraphGenerator.generateCompleteUndirectedGraph(4);
    UndirectedGraph undirectedGraph = graphModel.getUndirectedGraph();
    Node[] nodes = new Node[4];
    for (int i = 0; i < 4; i++) {
        Node currentNode = graphModel.factory().newNode(((Integer) (i + 4)).toString());
        nodes[i] = currentNode;
        undirectedGraph.addNode(currentNode);
    }
    for (int i = 0; i < 3; i++) {
        for (int j = i + 1; j < 4; j++) {
            Edge currentEdge = graphModel.factory().newEdge(nodes[i], nodes[j], false);
            undirectedGraph.addEdge(currentEdge);
        }
    }
    Graph graph = graphModel.getGraph();
    GraphDensity d = new GraphDensity();
    double density = d.calculateDensity(graph, false);
    double expectedAvDegree = 0.4286;
    double diff = Math.abs(density - expectedAvDegree);
    assertTrue(diff < 0.01);
}