How to use

Exponential

in

cern.jet.random.tdouble

/**
 * Returns a random number from the distribution with the given lambda.
 */
public static double staticNextDouble(double lambda) {
  synchronized (shared) {
    return shared.nextDouble(lambda);
  }
}

/**
 * Constructs a Negative Exponential distribution.
 */
public Exponential(double lambda, DoubleRandomEngine randomGenerator) {
  setRandomGenerator(randomGenerator);
  setState(lambda);
}

final double connectionSize = cac_connectionSize_d.get (d);
final double avIATSeconds = connectionSize * avHoldingTimeSeconds / h_d;
final double nextHoldingTimeSeconds = cac_auxDurationDeterministic? avHoldingTimeSeconds : cac_auxDurationExponential? Exponential.staticNextDouble(1/avHoldingTimeSeconds) : -1;
final double nextInterArrivalTimeSeconds = cac_auxIATDeterministic? avIATSeconds : cac_auxIATExponential? Exponential.staticNextDouble(1/avIATSeconds) : -1;
scheduleEvent(new SimEvent(simTime + Exponential.staticNextDouble(1 / srg.getMeanTimeToRepairInHours()) , SimEvent.DestinationModule.EVENT_GENERATOR , -1 , new GenerateRepairSRG(srg)));			
scheduleEvent(new SimEvent(simTime + Exponential.staticNextDouble(1 / srg.getMeanTimeToFailInHours()) , SimEvent.DestinationModule.EVENT_GENERATOR , -1 , new GenerateFailureSRG(srg)));			

  /**
   * Sets the uniform random number generated shared by all <b>static</b>
   * methods.
   * 
   * @param randomGenerator
   *            the new uniform random number generator to be shared.
   */
  private static void xstaticSetRandomGenerator(DoubleRandomEngine randomGenerator) {
    synchronized (shared) {
      shared.setRandomGenerator(randomGenerator);
    }
  }
}

final double connectionSize = cac_avConnectionSize_d.get (d);
final double avIATHours = connectionSize * avHoldingTimeHours / h_d;
final double nextHoldingTime = cac_auxDurationDeterministic? avHoldingTimeHours : cac_auxDurationExponential? Exponential.staticNextDouble(1/avHoldingTimeHours) : -1;
final double nextInterArrivalTime = cac_auxIATDeterministic? avIATHours : cac_auxIATExponential? Exponential.staticNextDouble(1/avIATHours) : -1;
final double lineRateThisLpGbps = randomPick (lineRatesGbps_t , probabilitiesLineRates_t);
scheduleEvent(new SimEvent(simTime + Exponential.staticNextDouble(1 / srg.getMeanTimeToRepairInHours()) , SimEvent.DestinationModule.EVENT_GENERATOR , -1 , new GenerateRepairSRG(srg)));			
scheduleEvent(new SimEvent(simTime + Exponential.staticNextDouble(1 / srg.getMeanTimeToFailInHours()) , SimEvent.DestinationModule.EVENT_GENERATOR , -1 , new GenerateFailureSRG(srg)));			

  /**
   * Sets the uniform random number generated shared by all <b>static</b>
   * methods.
   * 
   * @param randomGenerator
   *            the new uniform random number generator to be shared.
   */
  private static void xstaticSetRandomGenerator(DoubleRandomEngine randomGenerator) {
    synchronized (shared) {
      shared.setRandomGenerator(randomGenerator);
    }
  }
}

/**
 * Constructs a Negative Exponential distribution.
 */
public Exponential(double lambda, DoubleRandomEngine randomGenerator) {
  setRandomGenerator(randomGenerator);
  setState(lambda);
}

/**
 * Returns a random number from the distribution with the given lambda.
 */
public static double staticNextDouble(double lambda) {
  synchronized (shared) {
    return shared.nextDouble(lambda);
  }
}

  final double holdingTimeSeconds = (originalDemand.getAttribute("holdingTime") != null)? Double.parseDouble(originalDemand.getAttribute("holdingTime")) : cac_avHoldingTimeHours.getDouble() * 3600;
  final double avIATSeconds = connectionSize * holdingTimeSeconds / currentTheoreticalOfferedTraffic_d.get(d);
  final double nextInterArrivalTimeSeconds = cac_auxIATDeterministic? avIATSeconds : cac_auxIATExponential? Exponential.staticNextDouble(1/avIATSeconds) : -1;
  cac_avHoldingTimeSeconds_d.set (d,holdingTimeSeconds);
  cac_connectionSize_d.set (d,connectionSize);
for (SharedRiskGroup srg : initialNetPlan.getSRGs())
  final double nextEvent = Exponential.staticNextDouble(1 / srg.getMeanTimeToFailInHours());

/**
 * Returns a random number from the distribution.
 */
public double nextDouble() {
  return nextDouble(lambda);
}

  final double holdingTime = (originalDemand.getAttribute("holdingTime") != null)? Double.parseDouble(originalDemand.getAttribute("holdingTime")) : cac_avHoldingTimeHours.getDouble();
  final double avIATHours = averageConnectionSize * holdingTime / currentTheoreticalOfferedTraffic_d.get(d);
  final double nextInterArrivalTime = cac_auxIATDeterministic? avIATHours : cac_auxIATExponential? Exponential.staticNextDouble(1/avIATHours) : -1;
  cac_avHoldingTimeHours_d.set (d,holdingTime);
  cac_avConnectionSize_d.set (d,averageConnectionSize);
for (SharedRiskGroup srg : initialNetPlan.getSRGs())
  final double nextEvent = Exponential.staticNextDouble(1 / srg.getMeanTimeToFailInHours());
  scheduleEvent(new SimEvent(nextEvent , SimEvent.DestinationModule.EVENT_GENERATOR , -1 , new GenerateFailureSRG(srg)));

/**
 * Returns a random number from the distribution.
 */
public double nextDouble() {
  return nextDouble(lambda);
}