matlab 小波包数据c#画出热力图 代码实现

以下是使用C#绘制小波包数据热力图的示例代码：

using System;
using System.Collections.Generic;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Windows.Forms.DataVisualization.Charting;

namespace WaveletPacketHeatmap
{
    public partial class Form1 : Form
    {
        private Chart chart;

        public Form1()
        {
            InitializeComponent();

            // 创建 Chart 控件
            chart = new Chart();
            chart.Parent = this;
            chart.Dock = DockStyle.Fill;
            chart.BackColor = Color.White;

            // 添加热力图
            AddHeatmap();
        }

        private void AddHeatmap()
        {
            // 读取小波包数据
            double[,] data = ReadWaveletPacketData("wavelet_packet_data.txt");

            // 创建数据序列
            List<double> values = new List<double>();
            for (int i = 0; i < data.GetLength(0); i++)
            {
                for (int j = 0; j < data.GetLength(1); j++)
                {
                    values.Add(data[i, j]);
                }
            }

            // 计算数据范围
            double minValue = values.Min();
            double maxValue = values.Max();

            // 创建热力图序列
            List<DataPoint> points = new List<DataPoint>();
            for (int i = 0; i < data.GetLength(0); i++)
            {
                for (int j = 0; j < data.GetLength(1); j++)
                {
                    double value = data[i, j];
                    double intensity = (value - minValue) / (maxValue - minValue);
                    Color color = Color.FromArgb((int)(255 * intensity), 0, 0);
                    points.Add(new DataPoint(j, i, value) { Color = color });
                }
            }

            // 创建热力图
            Series heatmap = new Series();
            heatmap.ChartType = SeriesChartType.Point;
            heatmap.Points.AddRange(points.ToArray());
            chart.Series.Add(heatmap);

            // 设置坐标轴
            chart.ChartAreas.Add(new ChartArea());
            chart.ChartAreas[0].AxisX.Minimum = 0;
            chart.ChartAreas[0].AxisX.Maximum = data.GetLength(1);
            chart.ChartAreas[0].AxisY.Minimum = 0;
            chart.ChartAreas[0].AxisY.Maximum = data.GetLength(0);
            chart.ChartAreas[0].AxisX.Interval = 1;
            chart.ChartAreas[0].AxisY.Interval = 1;
            chart.ChartAreas[0].AxisX.MajorGrid.Enabled = false;
            chart.ChartAreas[0].AxisY.MajorGrid.Enabled = false;
            chart.ChartAreas[0].AxisX.MajorTickMark.Enabled = false;
            chart.ChartAreas[0].AxisY.MajorTickMark.Enabled = false;
            chart.ChartAreas[0].AxisX.LabelStyle.Enabled = false;
            chart.ChartAreas[0].AxisY.LabelStyle.Enabled = false;
        }

        private double[,] ReadWaveletPacketData(string filename)
        {
            List<double[]> rows = new List<double[]>();
            using (StreamReader reader = new StreamReader(filename))
            {
                while (!reader.EndOfStream)
                {
                    string line = reader.ReadLine();
                    string[] values = line.Split('\t');
                    double[] row = new double[values.Length];
                    for (int i = 0; i < values.Length; i++)
                    {
                        row[i] = double.Parse(values[i]);
                    }
                    rows.Add(row);
                }
            }
            double[,] data = new double[rows.Count, rows[0].Length];
            for (int i = 0; i < rows.Count; i++)
            {
                for (int j = 0; j < rows[i].Length; j++)
                {
                    data[i, j] = rows[i][j];
                }
            }
            return data;
        }
    }
}

在上面的示例代码中，`ReadWaveletPacketData` 方法用于从文件中读取小波包数据，`AddHeatmap` 方法用于创建热力图并添加到 Chart 控件中。通过设置数据点的颜色来实现热力图效果。最后需要设置坐标轴的范围、网格线、刻度标记和标签等属性来展示热力图。