Exemple #1
0
        private Point2DDouble[] CalcDistributionDataPoints(double[] valArr)
        {
            // Square root is a fairly good choice for automatically determining the category count based on number of values being analysed.
            // See http://en.wikipedia.org/wiki/Histogram (section: Number of bins and width).
            int categoryCount = (int)Math.Sqrt(valArr.Length);
            FrequencyDistributionData fdd = Utilities.CalculateDistribution(valArr, categoryCount);

            // Create array of distribution plot points.
            Point2DDouble[] pointArr = new Point2DDouble[fdd.FrequencyArray.Length];
            double incr = fdd.Increment;
            double x = fdd.Min + (incr/2.0);

            for(int i=0; i<fdd.FrequencyArray.Length; i++, x+=incr)
            {
                pointArr[i].X = x;
                pointArr[i].Y = fdd.FrequencyArray[i];
            }
            return pointArr;
        }
Exemple #2
0
        /// <summary>
        /// Updates an Point2DDouble array by sorting an array of values and copying the sorted values over the existing values in pointArr.
        /// Optionally creates the Point2DDouble array if it is null or is the wrong size.
        /// </summary>
        private void UpdateRankedDataPoints(double[] valArr, ref Point2DDouble[] pointArr)
        {

            // Sort values (largest first).
            Array.Sort(valArr, delegate(double x, double y)
            {
                if(x > y) {
                    return -1;
                }
                if(x < y) {
                    return 1;
                }
                return 0;
            });

            // Ensure point cache is ready.
            if(null == pointArr || pointArr.Length != valArr.Length)
            {
                pointArr = new Point2DDouble[valArr.Length];
                for(int i=0; i<valArr.Length; i++)  
                {
                    pointArr[i].X = i;
                    pointArr[i].Y = valArr[i];
                }
            }
            else
            {   // Copy sorted values into _specieSizePointArray.
                for(int i=0; i<valArr.Length; i++) {
                    pointArr[i].Y = valArr[i];
                }
            }
        }