AForge.Math.ContinuousHistogram.Update C# (CSharp) Method

        public void Update( )
        {
            int hits;
            int i, n = values.Length;
            int nM1 = n - 1;

            float rangeLength = range.Length;
            float rangeMin = range.Min;

            max    = 0;
            min    = n;
            mean   = 0;
            stdDev = 0;
            total  = 0;

            double sum = 0;

            // calculate mean, min, max
            for ( i = 0; i < n; i++ )
            {
                hits = values[i];

                if ( hits != 0 )
                {
                    // max
                    if ( i > max )
                        max = i;
                    // min
                    if ( i < min )
                        min = i;
                }

                // accumulate total value
                total += hits;
                // accumulate mean value
                sum += ( ( (double) i / nM1 ) * rangeLength + rangeMin ) * hits;
            }

            if ( total != 0 )
            {
                mean = (float) ( sum / total );
            }

            min = ( min / nM1 ) * rangeLength + rangeMin;
            max = ( max / nM1 ) * rangeLength + rangeMin;

            // calculate stadard deviation
            sum = 0;
            double diff;

            for ( i = 0; i < n; i++ )
            {
                hits = values[i];
                diff = ( ( (double) i / nM1 ) * rangeLength + rangeMin ) - mean;
                sum += diff * diff * hits;
            }

            if ( total != 0 )
            {
                stdDev = (float) Math.Sqrt( sum / total );
            }

            // calculate median
            int m, halfTotal = total / 2;

            for ( m = 0, hits = 0; m < n; m++ )
            {
                hits += values[m];
                if ( hits >= halfTotal )
                    break;
            }
            median = ( (float) m / nM1 ) * rangeLength + rangeMin;
        }
    }