// Principle algorithm for calculating the moving average 
// for next week.
// Variables:
// - moving: An array containing the weekly moving average
//           data. 
// - week: An array containing the week data to analyse.
// - nweeks: The number of weeks to base the moving average
//           upon.
// - thisWeek: An integer representation of this week.
void 
calculateMovingAverageForNextWeek(double[] moving, 
                                  double[] week,
                                  int nweeks,
                                  int thisWeek) {
    Double average = moving[thisWeek - 1];
    average -= week[thisWeek - nweeks - 1]/((double) nweeks);
    average += week[thisWeek + nweeks]/((double) nweeks);
    moving[i] = average;
}