unstable_rate.cs

List<double> result = GetErrorStatisticsArray(score.HitErrors);

hint = String.Format("Accuracy:\nError: {0:0.00}ms - {1:0.00}ms avg\nUnstable Rate: {2:0.00}\n", result[0], result[1], result[4] * 10, result[6], result[5]);

// input is a list of (user_hit_time - correct_time)
internal List<double> GetErrorStatisticsArray(List<int> list)
{
    if (list == null || list.Count == 0)
        return null;
    List<double> result = new List<double>(4);
    double total = 0, _total = 0, totalAll = 0;
    int count = 0, _count = 0;
    int max = 0, min = int.MaxValue;
    for (int i = 0; i < list.Count; i++)
    {
        if (list[i] > max)
            max = list[i];
        if (list[i] < min)
            min = list[i];
        totalAll += list[i];
        if (list[i] >= 0)
        {
            total += list[i];
            count++;
        }
        else
        {
            _total += list[i];
            _count++;
        }
    }
    double avarage = totalAll / list.Count;
    double variance = 0;
    for (int i = 0; i < list.Count; i++)
    {
        variance += Math.Pow(list[i] - avarage, 2);
    }
    variance = variance / list.Count;
    result.Add(_count == 0 ? 0 : _total / _count); //0
    result.Add(count == 0 ? 0 : total / count); //1
    result.Add(avarage); //2
    result.Add(variance); //3
    result.Add(Math.Sqrt(variance)); //4
    result.Add(max); //5
    result.Add(min); //6
    return result;
}