WPF点补间、拟合回归直线

1，path画刷，绘制正弦 点，线；

生成正弦点

                profilePoint.Value = * ( - Math.Sin(i * Math.PI / ));
                profilePoint.Type = ;

画点

             EllipseGeometry el = new EllipseGeometry();
             el.Center = p;
             el.RadiusX = 0.5;
             el.RadiusY = 0.5;

             Path mypath = new Path();
             mypath.Stroke = s;
             mypath.StrokeThickness = ;
             mypath.Data = el;

             panelCanvas.Children.Add(mypath);

画线

             LineGeometry line = new LineGeometry();
             line.StartPoint = startPoint;
             line.EndPoint = endPoint;

             Path mypath = new Path();
             mypath.Stroke = s;
             mypath.StrokeThickness = ;
             mypath.Data = line;

             panelCanvas.Children.Add(mypath);

2，回归直线

         /// <summary>
         /// 最小二乘法计算回归直线
         /// </summary>
         /// <param name="listPoints">最小二乘法计算单位</param>
         /// <returns></returns>
         public ApproximateLine calApproximateLine(List<Point> listPoints)
         {
             ApproximateLine appr = new ApproximateLine();
             double total = ;       //临时变量
             double averageX = ;    //X平均值
             double averageY = ;    //Y平均值
             double dispersion = ;  //协方差
             double b = ;  //斜率
             double a = ;  //y轴截距
             //x平均值计算
             total = ;
             for (int i = ; i < listPoints.Count; i++)
             {
                 total += listPoints[i].X;
             }
             averageX = total / listPoints.Count;
             //y平均值计算
             total = ;
             for (int i = ; i < listPoints.Count; i++)
             {
                 total += listPoints[i].Y;
             }
             averageY = total / listPoints.Count;
             //协方差计算
             total = ;
             for (int i = ; i < listPoints.Count; i++)
             {
                 total += ((listPoints[i].Y - averageY)*(listPoints[i].X - averageX));
             }
             dispersion = total / listPoints.Count;
             //斜率计算
             total = ;
             double tmp = ;
             for (int i = ; i < listPoints.Count; i++)
             {
                 total += listPoints[i].Y * listPoints[i].X;
                 tmp += Math.Pow(listPoints[i].X, );
             }
             b = (total - listPoints.Count*averageX*averageY)/(tmp - listPoints.Count*averageX*averageX);
             //截距计算
             a = averageY - b * averageX;
             //确定起止点坐标
             ScaleProfilePoint p1 = new ScaleProfilePoint();
             ScaleProfilePoint p2 = new ScaleProfilePoint();
             p1.Type = ;
             p1.ValueX = listPoints[].X;
             p1.ValueZ = a + b * p1.ValueX;
             p2.Type = ;
             p2.ValueX = listPoints[listPoints.Count-].X;
             p2.ValueZ = a + b * p2.ValueX;
             //填充返回值
             appr.Dispersion = dispersion;
             appr.Horizontal = true;
             appr.StartPnt = p1;
             appr.EndPnt = p2;
             return appr;
         }

3，去除canvas内的元素，清空画布

this.panelCanvas.Children.Clear();

附上工程源码