Ejemplo n.º 1
0
  public double getValue(double time) {
    double x;
    double localLambda;

    if (lambdaTableEnabled) {
      localLambda = lambdaTable.getValue(time);
    } else {
      localLambda = lambda;
    }

    if (direction == BILATERAL) {
      double e;
      do {
        x = 2.0 * Math.random();
        if (x > 1.0) {
          x = 2.0 - x;
          e = -Math.log(x);
        } else e = Math.log(x);
        e = (e / 14.0 / localLambda) + 0.5;
      } while ((e > 1.0) || (e < 0.0));

      x = e;
    } else {
      do {
        while ((x = Math.random()) == 0) {}
        x = -Math.log(x) / 7.0 / localLambda;
      } while (x > 1.0);

      if (direction == INCREASING) {
        x = 1.0 - x;
      }
    }

    return x;
  }
Ejemplo n.º 2
0
  public Element saveAsXML() {
    Element retVal = new Element("probabilityGenerator");
    retVal.setAttribute("type", getClass().getName());

    retVal.addElement(XMLUtilities.writeInt("direction", direction));
    retVal.addElement(XMLUtilities.writeDouble("lambda", lambda));
    retVal.addElement(XMLUtilities.writeBoolean("lambdaTableEnabled", lambdaTableEnabled));
    retVal.addElement(lambdaTable.saveAsXML());

    return retVal;
  }
Ejemplo n.º 3
0
  public static ProbabilityGenerator loadFromXML(Element data) {
    Exponential retVal = new Exponential();

    Elements nodes = data.getElements();

    while (nodes.hasMoreElements()) {
      Element node = nodes.next();
      String nodeName = node.getName();

      if (nodeName.equals("direction")) {
        retVal.direction = XMLUtilities.readInt(node);
      } else if (nodeName.equals("lambda")) {
        retVal.lambda = XMLUtilities.readDouble(node);
      } else if (nodeName.equals("lambdaTableEnabled")) {
        retVal.lambdaTableEnabled = XMLUtilities.readBoolean(node);
      } else if (nodeName.equals("table")) {
        retVal.lambdaTable = Table.loadFromXML(node);
      }
    }

    return retVal;
  }
Ejemplo n.º 4
0
 public Exponential() {
   lambdaTable.setMin(.0001, false);
 }