能显示实现的代码吗

以下是一个简单的 C# 代码示例，用于展示四象限图：

using System;
using System.Windows.Forms;
using System.Windows.Forms.DataVisualization.Charting;

namespace FourQuadrantChart
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            // 定义两列数据
            double[] x = { 1, 2, 3, 4, 5 };
            double[] y = { 2, 3, -1, -4, 5 };

            // 添加数据到 Chart 控件中
            chart1.Series.Clear();
            chart1.Series.Add("Data");
            chart1.Series["Data"].ChartType = SeriesChartType.Point;
            for (int i = 0; i < x.Length; i++)
            {
                chart1.Series["Data"].Points.AddXY(x[i], y[i]);
            }

            // 设置散点图的样式和属性
            chart1.Series["Data"].Color = System.Drawing.Color.Blue;
            chart1.Series["Data"].MarkerStyle = MarkerStyle.Circle;
            chart1.Series["Data"].MarkerSize = 10;

            // 设置图表的属性
            chart1.ChartAreas[0].AxisX.Minimum = 0;
            chart1.ChartAreas[0].AxisX.Maximum = 6;
            chart1.ChartAreas[0].AxisX.Interval = 1;
            chart1.ChartAreas[0].AxisX.Title = "X Axis";
            chart1.ChartAreas[0].AxisY.Minimum = -6;
            chart1.ChartAreas[0].AxisY.Maximum = 6;
            chart1.ChartAreas[0].AxisY.Interval = 1;
            chart1.ChartAreas[0].AxisY.Title = "Y Axis";
            chart1.ChartAreas[0].AxisX.MajorGrid.LineColor = System.Drawing.Color.LightGray;
            chart1.ChartAreas[0].AxisY.MajorGrid.LineColor = System.Drawing.Color.LightGray;

            // 添加一个按钮控件，用于计算和展示趋势线和交点位置
            Button button1 = new Button();
            button1.Text = "Calculate";
            button1.Location = new System.Drawing.Point(10, 10);
            button1.Click += new EventHandler(button1_Click);
            this.Controls.Add(button1);
        }

        private void button1_Click(object sender, EventArgs e)
        {
            // 使用线性回归算法计算趋势线的斜率和截距
            double[] x = { 1, 2, 3, 4, 5 };
            double[] y = { 2, 3, -1, -4, 5 };
            double sumX = 0, sumY = 0, sumXY = 0, sumX2 = 0;
            for (int i = 0; i < x.Length; i++)
            {
                sumX += x[i];
                sumY += y[i];
                sumXY += x[i] * y[i];
                sumX2 += x[i] * x[i];
            }
            double slope = (x.Length * sumXY - sumX * sumY) / (x.Length * sumX2 - sumX * sumX);
            double intercept = (sumY - slope * sumX) / x.Length;

            // 添加趋势线
            chart1.Series.Add("TrendLine");
            chart1.Series["TrendLine"].Color = System.Drawing.Color.Red;
            chart1.Series["TrendLine"].ChartType = SeriesChartType.Line;
            chart1.Series["TrendLine"].Points.AddXY(0, intercept);
            chart1.Series["TrendLine"].Points.AddXY(6, slope * 6 + intercept);
            chart1.Series["TrendLine"].ToolTip = "y = " + slope.ToString("0.000") + "x + " + intercept.ToString("0.000");

            // 计算交点位置
            double x0 = -intercept / slope;
            double y0 = 0;
            if (x0 > 0 && x0 < 6)
            {
                y0 = slope * x0 + intercept;
            }

            // 添加注释
            chart1.Annotations.Clear();
            chart1.Annotations.Add(new TextAnnotation
            {
                Text = "(" + x0.ToString("0.0") + ", " + y0.ToString("0.0") + ")",
                X = x0,
                Y = y0,
                ForeColor = System.Drawing.Color.Red,
                Font = new System.Drawing.Font("Arial", 10),
                LineColor = System.Drawing.Color.Transparent
            });

            // 分割图表成四个象限
            chart1.ChartAreas[0].AxisX.Crossing = y0;
            chart1.ChartAreas[0].AxisY.Crossing = x0;
            chart1.ChartAreas[0].AxisX.ArrowStyle = AxisArrowStyle.Triangle;
            chart1.ChartAreas[0].AxisY.ArrowStyle = AxisArrowStyle.Triangle;
            chart1.ChartAreas[0].AxisX.LineColor = System.Drawing.Color.Black;
            chart1.ChartAreas[0].AxisY.LineColor = System.Drawing.Color.Black;

            // 添加数据点
            chart1.Series.Add("Data1");
            chart1.Series["Data1"].ChartType = SeriesChartType.Point;
            chart1.Series["Data1"].Color = System.Drawing.Color.Green;
            chart1.Series["Data1"].MarkerStyle = MarkerStyle.Circle;
            chart1.Series["Data1"].MarkerSize = 10;
            chart1.Series.Add("Data2");
            chart1.Series["Data2"].ChartType = SeriesChartType.Point;
            chart1.Series["Data2"].Color = System.Drawing.Color.Orange;
            chart1.Series["Data2"].MarkerStyle = MarkerStyle.Circle;
            chart1.Series["Data2"].MarkerSize = 10;
            for (int i = 0; i < x.Length; i++)
            {
                if (x[i] > x0 && y[i] > y0)
                {
                    chart1.Series["Data1"].Points.AddXY(x[i], y[i]);
                }
                else if (x[i] > x0 && y[i] < y0)
                {
                    chart1.Series["Data2"].Points.AddXY(x[i], y[i]);
                }
                else if (x[i] < x0 && y[i] < y0)
                {
                    chart1.Series["Data1"].Points.AddXY(x[i], y[i]);
                }
                else if (x[i] < x0 && y[i] > y0)
                {
                    chart1.Series["Data2"].Points.AddXY(x[i], y[i]);
                }
            }
        }
    }
}

以上代码实现了基本的四象限图的制作，可以根据实际需求进行调整和优化。