public void smooth_data()
        {
            int i     = 0;
            int start = 0;

            while (i < current_in_index)
            {
                if (!(Double.IsNaN(Storage[i])))
                {
                    i++;
                }
                else // here is a NAN delimiter
                {
                    double[] source   = new double[i - start];
                    double[] smoothed = new double[source.Length];
                    // copy data
                    for (int j = 0; j < source.Length; j++)
                    {
                        source[j] = Storage[j + start];
                    }

                    Smoother_cls.smooth_double_array(source, ref smoothed);

                    //copy data
                    for (int j = 0; j < smoothed.Length; j++)
                    {
                        Smoothed_Storage[j + start] = smoothed[j];
                    }
                    Smoothed_Storage[i] = Double.NaN;
                    i++;
                    start = i;
                }
            }
        }
Exemplo n.º 2
0
        private void calculate_mean_cycle()
        {
            Storage.smooth_data();
            // calculate length of mean cycle
            Base_length_value = metronome.period_ms / 25; // 40 Hz = 25 mSec period

            int i = 0;
            int cycles_counter = 0;

            list_of_cycles = new List <single_cycle_cls>();
            while (i < Storage.current_in_index)
            {
                if (!(Double.IsNaN(Storage.get_data(i))))
                {
                    i++;
                }
                else // here is a NAN delimiter
                {
                    i++;
                    cycles_counter++;
                    list_of_cycles.Add(new single_cycle_cls());
                    list_of_cycles.Last().start_index = i;
                    list_of_cycles.Last().length      = 0;
                    while ((i < Storage.current_in_index) && (!(Double.IsNaN(Storage.get_data(i)))))
                    {
                        i++;
                        list_of_cycles.Last().length++;
                    }
                }
            }

            // assemble array of mean cycle
            mean_cycle_buffer          = new double[Base_length_value];
            mean_filtered_cycle_buffer = new double[Base_length_value];
            int good_cycles_counter = 0;

            foreach (single_cycle_cls item in list_of_cycles)
            {
                if (Math.Abs(item.length - Base_length_value) <= 1)
                {
                    // add this cycle to mean
                    for (int j = 0; j < Math.Min(item.length, Base_length_value); j++)
                    {
                        mean_cycle_buffer[j] += Storage.get_data(item.start_index + j);
                    }
                    if (item.length < Base_length_value)
                    {
                        mean_cycle_buffer[Base_length_value - 1] = mean_cycle_buffer[Base_length_value - 2];
                    }
                    good_cycles_counter++;
                }
            }
            // calculate mean
            if (good_cycles_counter > 0)
            {
                for (int j = 0; j < Base_length_value; j++)
                {
                    mean_cycle_buffer[j] /= good_cycles_counter;
                }
            }
            //************************* simple mean ******************************************************

            // create list of j-th elements of cycles
            List <double> j_slice = new List <double>();

            // assemble array of filtered mean cycle
            for (int j = 0; j < Base_length_value; j++)
            {
                // populate list of j-th elements of cycles
                foreach (single_cycle_cls item in list_of_cycles)
                {
                    if (j <= item.length)
                    {
                        //create new item of list
                        j_slice.Add(Storage.get_smoothed_data(item.start_index + j));
                    }
                }
                // create auxiliary array (for sorting)
                double[] sorted_array = new double[j_slice.Count];
                int      k            = 0;
                foreach (double item in j_slice)
                {
                    sorted_array[k] = item;
                    k++;
                }

                j_slice.Clear();

                // sort array
                bubble_sorting(ref sorted_array);
                // calculate mean
                mean_filtered_cycle_buffer[j] = 0;
                int counter = 0;
                // drop 2 maxes and 2 mines
                if (sorted_array.Length >= 5)
                {
                    for (int m = 2; m < (sorted_array.Length - 2); m++)
                    {
                        mean_filtered_cycle_buffer[j] += sorted_array[m];
                        counter++;
                    }
                    mean_filtered_cycle_buffer[j] /= counter;
                }
                else if (sorted_array.Length >= 1)
                {
                    for (int m = 0; m < sorted_array.Length; m++)
                    {
                        mean_filtered_cycle_buffer[j] += sorted_array[m];
                        counter++;
                    }
                    mean_filtered_cycle_buffer[j] /= counter;
                }
            }

            // smooth filtered mean array ***********************
            smoothed_cycle_buffer = new double[mean_filtered_cycle_buffer.Length];
            Smoother_cls.smooth_double_array(mean_filtered_cycle_buffer, ref smoothed_cycle_buffer);
        }// end private void calculate_mean_cycle()