private static XYDataset createForceDataset(int i) {
    TimeSeriesCollection timeseriescollection = new TimeSeriesCollection();
    TimeSeries timeseries = new TimeSeries("Wind Force", org.jfree.data.time.Minute.class);
    Object obj = new Minute();
    double d = 3D;
    for (int j = 0; j < i; j++) {
      timeseries.add(((RegularTimePeriod) (obj)), d);
      obj = ((RegularTimePeriod) (obj)).next();
      d = Math.max(0.5D, d + (Math.random() - 0.5D) * 0.5D);
    }

    timeseriescollection.addSeries(timeseries);
    return timeseriescollection;
  }