Ejemplo n.º 1
0
  private static Instances convertToInstances(
      final IScope scope,
      final IList<String> attributes,
      final IAddressableContainer<Integer, IAgent, Integer, IAgent> agents)
      throws GamaRuntimeException {
    FastVector attribs = new FastVector();
    for (String att : attributes) {
      attribs.addElement(new Attribute(att));
    }
    Instances dataset =
        new Instances(scope.getAgentScope().getName(), attribs, agents.length(scope));
    for (IAgent ag : agents.iterable(scope)) {

      int nb = attributes.size();
      double vals[] = new double[nb];
      for (int i = 0; i < nb; i++) {
        String attrib = attributes.get(i);
        Double var = Cast.asFloat(scope, ag.getDirectVarValue(scope, attrib));
        vals[i] = var;
      }
      Instance instance = new Instance(1, vals);
      dataset.add(instance);
    }
    return dataset;
  }
Ejemplo n.º 2
0
  private static IList<IList<IAgent>> clusteringUsingWeka(
      final IScope scope,
      final Clusterer clusterer,
      final IList<String> attributes,
      final IAddressableContainer<Integer, IAgent, Integer, IAgent> agents)
      throws GamaRuntimeException {
    Instances dataset = convertToInstances(scope, attributes, agents);
    try {
      clusterer.buildClusterer(dataset);

      IList<IList<IAgent>> groupes = GamaListFactory.create(Types.LIST.of(Types.AGENT));

      for (int i = 0; i < clusterer.numberOfClusters(); i++) {
        groupes.add(GamaListFactory.<IAgent>create(Types.AGENT));
      }
      for (int i = 0; i < dataset.numInstances(); i++) {
        Instance inst = dataset.instance(i);
        int clusterIndex = -1;
        clusterIndex = clusterer.clusterInstance(inst);
        IList<IAgent> groupe = groupes.get(clusterIndex);
        groupe.add(agents.get(scope, i));
      }
      return groupes;
    } catch (Exception e) {
      return null;
    }
  }