frm_af_xl.cs

基于BP算法的贝叶斯网络参数学习

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Collections;

namespace bs
{
    public partial class frm_af_xl : Form
    {
        public ArrayList arrXlq = null;//训练前随机生成的边的权值
        public LineArray arrXlh = null;//训练后相应的权值
        public ArrayList arrYb = null;//生成训练样本的权值
        public Image image = null;//画图的图片
        public Graphics g1 = null;
        public Graphics g2 = null;
        public int NumB=0;//边的条数，省去访问了
        public frm_af_xl()
        {
            InitializeComponent();
        }

        private void frm_af_xl_Load(object sender, EventArgs e)
        {
            #region 窗体Load事件
            if (this.arrXlh.Count == 0 || this.arrXlq.Count == 0 || this.arrYb.Count == 0)
            {
                MessageBox.Show("边的权值不完全!");
                return;
            }
            else
            {
                for (int i = 0; i < this.arrXlh.Count; i++)
                {
                    ListViewItem li = new ListViewItem((i + 1).ToString());
                    li.SubItems.Add((string)this.arrYb[i]);
                    li.SubItems.Add((string)this.arrXlq[i]);
                    li.SubItems.Add(this.arrXlh[i].wij);
                    this.listView1.Items.Add(li);
                    this.NumB++;
                }
                //MessageBox.Show(listView1.Items.Count.ToString());
            }
            g1 = this.pictureBox1.CreateGraphics();
            this.image = new Bitmap(this.pictureBox1.Width,this.pictureBox1.Height,g1);
            g2 = Graphics.FromImage(this.image);
            this.pictureBox1.Image = this.image;
            Pen pxy = new Pen(Color.Red, 5);

            g2.DrawLine(pxy, 20, 20, 20, 650);//y轴
            g2.DrawLine(pxy, 20, 650, this.pictureBox1.Width-20, 650);//x轴

            Pen pYb = new Pen(Color.Yellow, 5);//样本权值曲线的画笔
            Point ps=new Point();
            Point pd=new Point();
            for (int i = 0; i < this.NumB-1; i++)//样本权值曲线
            {
                double d1 = Convert.ToDouble((string)this.arrYb[i]);
                d1 *= 100d;
                int t1 = (int)d1;
                ps.X=i*(600/(this.NumB-1))+20;
                ps.Y=500-t1;
                double d2 = Convert.ToDouble((string)this.arrYb[i+1]);
                d2 *= 100d;
                int t2 = (int)d2;
                pd.X=(i+1)*(600/(this.NumB-1))+20;
                pd.Y =500-t2;
                g2.DrawLine(pYb, ps, pd);
                SolidBrush sr = new SolidBrush(Color.LightSkyBlue);
                g2.FillEllipse(sr, ps.X-5,ps.Y-5,10,10);
                g2.FillEllipse(sr, pd.X - 5, pd.Y - 5, 10, 10);
            }

            g2.DrawLine(pYb, this.pictureBox1.Width - 100, 25, this.pictureBox1.Width - 60,25);
            Font font=new Font(FontFamily.GenericSerif,10);
            SolidBrush br=new SolidBrush(Color.Red);
            Point pf=new Point();
            pf.X=this.pictureBox1.Width-60;
            pf.Y=20;
            g2.DrawString("样本权值", font, br, pf);

            Pen pSj = new Pen(Color.Blue,5);//随机生成的权值
            for (int i = 0; i < this.NumB - 1; i++)//随机生成权值曲线
            {
                double d1 = Convert.ToDouble((string)this.arrXlq[i]);
                d1 *= 100d;
                int t1 = (int)d1;
                ps.X = i * (600 / (this.NumB - 1)) + 20;
                ps.Y = 500 - t1;
                double d2 = Convert.ToDouble((string)this.arrXlq[i + 1]);
                d2 *= 100d;
                int t2 = (int)d2;
                pd.X = (i + 1) * (600 / (this.NumB - 1)) + 20;
                pd.Y = 500 - t2;
                g2.DrawLine(pSj, ps, pd);
                SolidBrush sr = new SolidBrush(Color.LightSkyBlue);
                g2.FillEllipse(sr, ps.X - 5, ps.Y - 5, 10, 10);
                g2.FillEllipse(sr, pd.X - 5, pd.Y - 5, 10, 10);
            }
            g2.DrawLine(pSj, this.pictureBox1.Width - 100, 45, this.pictureBox1.Width - 60, 45);
            Point pf1 = new Point();
            pf1.X = this.pictureBox1.Width - 60;
            pf1.Y = 40;
            g2.DrawString("随机权值", font, br, pf1);
            g2.DrawString("权值", font, br, 20,20);
            g2.DrawString("边的个数", font, br, this.pictureBox1.Width - 100, 630);


            Pen pxlh = new Pen(Color.Orange, 5);
            for (int i = 0; i < this.NumB - 1; i++)//训练后权值曲线
            {
                double d1 = Convert.ToDouble(this.arrXlh[i].wij);
                d1 *= 100d;
                int t1 = (int)d1;
                ps.X = i * (600 / (this.NumB - 1)) + 20;
                ps.Y = 500 - t1;
                double d2 = Convert.ToDouble(this.arrXlh[i+1].wij);
                d2 *= 100d;
                int t2 = (int)d2;
                pd.X = (i + 1) * (600 / (this.NumB - 1)) + 20;
                pd.Y = 500 - t2;
                g2.DrawLine(pxlh, ps, pd);
                SolidBrush sr = new SolidBrush(Color.LightSkyBlue);
                g2.FillEllipse(sr, ps.X - 5, ps.Y - 5, 10, 10);
                g2.FillEllipse(sr, pd.X - 5, pd.Y - 5, 10, 10);
            }
            g2.DrawLine(pxlh, this.pictureBox1.Width - 100, 65, this.pictureBox1.Width - 60, 65);
            Point pf2 = new Point();
            pf2.X = this.pictureBox1.Width - 60;
            pf2.Y = 60;
            g2.DrawString("训练权值", font, br, pf2);
            #endregion
        }

        private void button2_Click(object sender, EventArgs e)
        {
            #region 保存图片代码
            if (this.image == null)
            {
                MessageBox.Show("您还没有画图");
                return;
            }
            else
            {
                SaveFileDialog sf = new SaveFileDialog();
                sf.DefaultExt = ".bmp";
                sf.Filter = "bmp文件|*.bmp";
                if (sf.ShowDialog() == DialogResult.OK)
                {
                    try
                    {
                        this.image.Save(sf.FileName);
                    }
                    catch (Exception er)
                    {
                        MessageBox.Show(er.Message);
                    }
                }
            }
            #endregion
        }
    }
}