NPlot的基本用法



NPlot的基本用法

1、NPlot的基本用法
 图表控件一直是很难找的，特别是免费又强大的。NPlot是一款非常难得的.Net平台下的图表控件，能做各种曲线图，柱状图，饼图，散点图，股票图等，而且它免费又开源，使用起来也非常符合程序员的习惯。唯一的缺点就是文档特别难找，难读。通过对其文档的阅读和对示例程序源代码的分析，现在将NPlot的基本概念整理如下：
   NPlot的命名空间包括NPlot,NPlot.Bitmap,NPlot.Web,NPlot.Web.Design,NPlot.Windows等，其中最核心的，管理各种图表的类都属于NPlot命名空间，NPlot.Bitmap针对位图的管理，NPlot.Web,NPlot.Web.Design和NPlot.Windows则可视为NPlot图表在Web Form和Windows Form上的容器(PlotSurface2D)。这些容器可以拖到Form上，也可以位于其他容器之中。要在应用程序中应用NPlot控件，首先要把所下载的NPlot.dll添加到.Net工程中。并将其添加到工具箱托盘中。添加方式为：在工具箱上单击右键，选择“选择项”，会出现“选择工具箱项”对话框，在“.Net Frameworks组件”属性页，选择浏览，找到NPlot.dll添加到工具箱项。这时工具箱中会出现NPlot控件。在设计应用程序界面时，可以将其拖入应用程序界面，系统会在代码中自动创建一个PlotSurface2D对象。
  PlotSurface2D对象是NPlot图表的容器，所有的图表图形，坐标，标题（都继承IDrawable接口）等各种信息都可以被加入PlotSurface2D。PlotSurface2D拥有一个非常重要的方法：Add。各种图表图形，坐标，标题都可以通过Add加入PlotSurface2D对象,plot:为控件名称,并引入空间：using NPlot;我们可以通过下面简单的代码示例来了解NPlot的基本用法：
public void plotline()
{
// --- Plotting ---
  plot.Clear();
// --- Grid Code ---
  Grid mygrid = new Grid();
  mygrid.HorizontalGridType = Grid.GridType.None;
  mygrid.VerticalGridType = Grid.GridType.Fine;
  plot.Add(mygrid);
  plot.Title = "Test";
  StepPlot line = new StepPlot();
  line.Pen = new Pen (Color.Red, 1);
  line.OrdinateData = new int [] {0, 1, 0, 1, 1,0};
  line.HideVerticalSegments = false;
  plot.Add(line);
  plot.Refresh();
  return;
}
Grid对象和StepPlot对象都是NPlot命名空间中的对象，都继承于NPlot.IDrawable，都可以作为PlotSurface2D.Add函数调用，在NPlot中画图，就是把网格，坐标，图形等各种对象加入PlotSurface2D对象中，一切就那么简单！
NPlot的下载地址：http://netcontrols.org/nplot/wiki/index.php?n=Main.HomePage
NPlot的开发文档：http://www.andrewtheken.com/nplot/
E_mail：[email protected] QQ:55774088
public void plotline(double[] x,double[] y)
    {
        // --- Plotting ---
        plot.Clear();
        // --- Grid Code ---
        Grid mygrid = new Grid();
        mygrid.HorizontalGridType =Grid.GridType.None;
        mygrid.VerticalGridType =Grid.GridType.Fine;
        plot.Add(mygrid);
        plot.Title ="××××";
        LinePlot lp = newLinePlot();
        /////横坐标赋值
        lp.AbscissaData = x;//newdouble[] { 0, 25,125 };
        /////纵坐标赋值
        lp.OrdinateData = y;//newdouble[] { 200, 200, 0};

        //StepPlot line = newStepPlot();
        //line.Pen = newPen(Color.Red, 1);
        //line.OrdinateData = newdouble[] { 5.5, 4.0, 1.5, 2.5, 3.5 };
        //line.HideVerticalSegments= false;
        plot.Add(lp);
        plot.Refresh();
        return;
    }

2、Nplot用法举例

              myPlot.Clear();

 

                //加入网格

                Grid mygrid = new Grid();

                myPlot.Add(mygrid);

                myPlot.Title = "测试";

 

 

                LinePlot lp = new LinePlot();

                double[] a = new double[] { 1,2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 };

                string[] b = new string[] {"1", "2", "3", "4", "5","6", "7", "8", "9", "10","11", "12", };

                double[] ab = new double[] { 0,0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

                ArrayList dates = newArrayList();

               dates.Add(Convert.ToDateTime("2007-01-01"));

               dates.Add(Convert.ToDateTime("2008-01-02 "));

               dates.Add(Convert.ToDateTime("2008-01-03 "));

               dates.Add(Convert.ToDateTime("2008-01-04 "));

               dates.Add(Convert.ToDateTime("2008-01-05 "));

                dates.Add(Convert.ToDateTime("2008-01-06"));

               dates.Add(Convert.ToDateTime("2008-01-07 "));

               dates.Add(Convert.ToDateTime("2008-01-08 "));

               dates.Add(Convert.ToDateTime("2008-01-09 "));

                dates.Add(Convert.ToDateTime("2008-01-10"));

               dates.Add(Convert.ToDateTime("2008-01-11 "));

               dates.Add(Convert.ToDateTime("2008-02-12 "));

                lp.AbscissaData = dates;

 

                //柱状

                BarPlot storeGrowth = newBarPlot();

                storeGrowth.AbscissaData =dates;

                storeGrowth.OrdinateDataTop =a;

                storeGrowth.OrdinateDataBottom= ab;

                storeGrowth.FillBrush =NPlot.RectangleBrushes.Solid.Red;

                //storeGrowth.BorderPen = newPen( Color.Black, 2.0f );

                myPlot.Add(storeGrowth);

 

                //标签

                LabelPointPlot tp1 = newLabelPointPlot();

                tp1.AbscissaData = dates;

                tp1.OrdinateData  = a;

                tp1.TextData = b;

                tp1.LabelTextPosition =LabelPointPlot.LabelPositions.Above;

                tp1.Marker = newMarker(Marker.MarkerType.None, 10);

                myPlot.Add(tp1);

 

 

                //lp.

                lp.DataSource = a;

                lp.Pen = new Pen(Color.Blue,3.0f);

                lp.Label = "GaussianFunction";

                myPlot.Add(lp);

                myPlot.XAxis1.Label = "时间";

                myPlot.YAxis1.Label = "次数";

               //myPlot.XAxis1.WorldLength = 60 * 60 * 24;

                //设置网格距离

                //myPlot.XAxis1.WorldMin +=myPlot.XAxis1.WorldLength/ 12;//WorldLength=n*24*60*60;

                //myPlot.XAxis1.WorldMax -=myPlot.XAxis1.WorldLength / 2;

                //myPlot.XAxis1.

                //myPlot.XAxis1.WorldLength =10;

                //myPlot.

                //让日期斜45度。

                myPlot.XAxis1.TicksLabelAngle =45;

 

                //下面代码可让窗体移动begin;

                myPlot.AddInteraction(newNPlot.Windows.PlotSurface2D.Interactions.HorizontalDrag());

                //myPlot.AddInteraction(newNPlot.Windows.PlotSurface2D.Interactions.VerticalDrag());

                myPlot.AddInteraction(newNPlot.Windows.PlotSurface2D.Interactions.AxisDrag(true));

 

                myPlot.Refresh();

3、Nplot用法

///首先要将下载的NPlot.dll加到工具箱里，拖一个控件到窗体上，声明using NPlot;

 

////////对所绘的图进行打印与保存//////////
private void print()
{
    myPlot.Print(true);
}
private void save()
{
    saveFileDialog1.Filter = "位图(*.bmp)|*.bmp|JPEG(*.jpg)|*.jpg;*.jpeg;*,jpe|Gif(*.gif)|*.gif|Tiff(*.tiff)|*.tiff|Png(*.png)|*.png|Exif(*.exif)|*.exif|所有文件(*.*)|*.*";
    if (saveFileDialog1.ShowDialog() == DialogResult.OK)
    {
       try
        {
            int h = myPlot.Size.Height;
            int w = myPlot.Size.Width;
            Bitmap bm = new Bitmap(w, h);
            Bitmap bm1 = new Bitmap(w, h);
            Rectangle rt = new Rectangle(1, 1, w, h);
            saveFileDialog1.RestoreDirectory = true;
            saveFileDialog1.CreatePrompt = true;
            myPlot.DrawToBitmap(bm, rt);
            if (saveFileDialog1.FilterIndex == 1)
            {
                bm.Save(saveFileDialog1.FileName);
            }
            if (saveFileDialog1.FilterIndex == 2)
            {
                bm.Save(saveFileDialog1.FileName, ImageFormat.Jpeg);
            }
            if (saveFileDialog1.FilterIndex == 3)
            {
                bm.Save(saveFileDialog1.FileName, ImageFormat.Gif);
            }
            if (saveFileDialog1.FilterIndex == 4)
            {
                bm.Save(saveFileDialog1.FileName, ImageFormat.Tiff);
            }
            if (saveFileDialog1.FilterIndex == 5)
            {
                bm.Save(saveFileDialog1.FileName, ImageFormat.Png);
            }
            if (saveFileDialog1.FilterIndex == 6)
            {
                bm.Save(saveFileDialog1.FileName, ImageFormat.Exif);
            }
        }
        catch (ExceptionMyEx)
        {
            MessageBox.Show(MyEx.ToString(), "错误提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
        }
    }
}

///放大缩小
private void changeSize()
{
    this.myPlot.XAxis1.IncreaseRange(0.1);
    this.myPlot.YAxis1.IncreaseRange(0.1); //缩小
    this.myPlot.XAxis1.IncreaseRange(-0.1);
    this.myPlot.YAxis1.IncreaseRange(-0.1); //放大
    this.myPlot.Refresh();
}
/////////各种绘图//////////         
private void plot()
{
    this.myPlot.Clear(
    ////////标签//////////
    string[] strLabel = new string[leng];
    for (int i = 0; i < leng; i++)
        strLabel[i] =Convert.ToString(p[i]);
    LabelPointPlot labp = new LabelPointPlot();
    labp.AbscissaData = X;
    labp.OrdinateData = p;
    labp.TextData = strLabel;
    labp.LabelTextPosition =LabelPointPlot.LabelPositions.Above;
    labp.Marker = new Marker(Marker.MarkerType.Square, 8);
    labp.Marker.Color = Color.Blue;
    myPlot.Add(labp);
    myPlot.Refresh();           
    ////////网格//////////
    Grid mygrid = new Grid();
    mygrid.HorizontalGridType = Grid.GridType.Fine;
    mygrid.VerticalGridType = Grid.GridType.Fine;
    this.myPlot.Add(mygrid);
    ////////曲线，双坐标轴//////////
    ///////水平线//////////
    HorizontalLine line = new HorizontalLine(1.2);
    line.LengthScale = 0.89f;
    this.myPlot.Add(line, -10);
    ///////垂直线///////////
    VerticalLine line2 = new VerticalLine(1.2);
    line2.LengthScale = 0.89f;
    this.myPlot.Add(line2);
    ///////普通的线///////////
    LinePlot lp3 = new LinePlot();
    lp3.OrdinateData = yPW;
    lp3.AbscissaData = x;
    lp3.Pen = new Pen(Color.Orange);
    lp3.Pen.Width = 2;
    lp3.Label = " 价格";
    this.myPlot.Add(lp3);
    LinearAxis linx = (LinearAxis)myPlot.XAxis1;
    this.myPlot.XAxis1 = linx;
    LinearAxis liny = (LinearAxis)myPlot.YAxis1;
    liny.Label = "价格";
    liny.AxisColor = Color.Orange;
    liny.LabelColor = Color.Orange;
    liny.TickTextColor = Color.Orange;
    this.myPlot.YAxis1 = liny;
    LinePlot lp4 = new LinePlot();
    lp4.OrdinateData = yUw;
    lp4.AbscissaData = x;
    lp4.Pen = new Pen(Color.Green);
    lp4.Pen.Width = 2;
    lp4.Label = "销售量";
    this.myPlot.Add(lp4, PlotSurface2D.XAxisPosition.Top,PlotSurface2D.YAxisPosition.Right);
    LinearAxis liny2 = (LinearAxis)myPlot.YAxis2;
    liny2.WorldMax = 1.2;
    liny2.WorldMin = 0;
    liny2.Label = "销售量";
    liny2.AxisColor = Color.Green;
    liny2.LabelColor = Color.Green;
    liny2.TickTextColor = Color.Green;
    this.myPlot.YAxis2 = liny2;
    ///////图例//////////
    this.myPlot.Legend = new Legend();
    this.myPlot.Legend.AttachTo(PlotSurface2D.XAxisPosition.Top,PlotSurface2D.YAxisPosition.Right);
    this.myPlot.Legend.NumberItemsHorizontally = 2;
    this.myPlot.Legend.HorizontalEdgePlacement =Legend.Placement.Inside;
    this.myPlot.Legend.VerticalEdgePlacement =Legend.Placement.Inside;
    this.myPlot.Legend.YOffset = 5;
    this.myPlot.Legend.XOffset = -5;
    ///////窗体移动//////////
    this.myPlot.AddInteraction(newNPlot.Windows.PlotSurface2D.Interactions.HorizontalDrag());
    this.myPlot.AddInteraction(newNPlot.Windows.PlotSurface2D.Interactions.VerticalDrag());
    this.myPlot.AddInteraction(newNPlot.Windows.PlotSurface2D.Interactions.AxisDrag(true));
    //////累加的柱状图////////
    HistogramPlot hp3 = new HistogramPlot();
    hp3.AbscissaData = x;
    hp3.OrdinateData = yCC1;
    hp3.BaseWidth = 0.6f;
    hp3.RectangleBrush =RectangleBrushes.Vertical.FaintBlueFade;
    hp3.Filled = true;
    hp3.Label = "一月";
    HistogramPlot hp4 = new HistogramPlot();
    hp4.AbscissaData = x;
    hp4.OrdinateData = yCC2;
    hp4.Label = "二月";
    hp4.RectangleBrush =RectangleBrushes.Horizontal.FaintGreenFade;
    hp4.Filled = true;
    hp4.StackedTo(hp3);
    this.myPlot.Add(hp3);
    this.myPlot.Add(hp4);
    //////阶状图////////                  
    StepPlot sp1 = new StepPlot();
    sp1.OrdinateData = yCH1;
    sp1.AbscissaData = x;
    sp1.Label = "高度";
    sp1.Pen.Width = 2;
    sp1.Pen.Color = Color.Blue;
    this.myPlot.Add(sp1);
    /////点状图////////   
    Marker m = new Marker(Marker.MarkerType.Cross1, 6, newPen(Color.Blue, 2.0F));
    PointPlot pp = new PointPlot(m);
    pp.OrdinateData = a;
    pp.AbscissaData = new StartStep(-500.0, 10.0);
    pp.Label = "Random";
    this.myPlot.Add(pp);
    /////Image图////////
    double[,] map = new double[19, 19];
    for (int i = 0; i < 19; ++i)
    {
        for (int j = 0;j < 19; ++j)
        {
            map[i, j] = Convert.ToDouble(tokens[i * 19 + j], new
                System.Globalization.CultureInfo("en-US"));
        }
    }
    ImagePlot ip = new ImagePlot(map, -9.0f, 1.0f, -9.0f,1.0f);
    ip.Gradient = new LinearGradient(Color.Gold,Color.Black);
    this.myPlot.SmoothingMode =System.Drawing.Drawing2D.SmoothingMode.None;
    this.myPlot.AddInteraction(newNPlot.Windows.PlotSurface2D.Interactions.RubberBandSelection());
    this.myPlot.Add(ip);
    ///////蜡烛图///////////
    int[] opens =  { 1, 2, 1, 2, 1,3 };
    double[] closes = { 2, 2, 2, 1, 2, 1 };
    float[] lows =   { 0, 1, 1, 1, 0,0 };
    System.Int64[] highs =  { 3, 2, 3, 3, 3,4 };
    int[] times =  { 0, 1, 2, 3, 4,5 };
    CandlePlot cp = new CandlePlot();
    cp.CloseData = closes;
    cp.OpenData = opens;
    cp.LowData = lows;
    cp.HighData = highs;
    cp.AbscissaData = times;
    this.myPlot.Add(cp);
    /////对数坐标轴////////     

    // x axis
    LogAxis logax = new LogAxis(plotSurface.XAxis1);
    logax.WorldMin = xmin;
    logax.WorldMax = xmax;
    logax.AxisColor = Color.Red;
    logax.LabelColor = Color.Red;
    logax.TickTextColor = Color.Red;
    logax.LargeTickStep = 1.0f;
    logax.Label = "x";
    this.myPlot.XAxis1 = logax;
    // y axis
    LogAxis logay = new LogAxis(plotSurface.YAxis1);
    logay.WorldMin = ymin;
    logay.WorldMax = ymax;
    logay.AxisColor = Color.Red;
    logay.LabelColor = Color.Red;
    logay.TickTextColor = Color.Red;
    logay.LargeTickStep = 1.0f;
    logay.Label = "x^2";
    this.myPlot.YAxis1 = logay;
    /////字符坐标轴////////
    LabelAxis la1 = new LabelAxis(this.myPlot.XAxis1);
    string[] sX = new string [15];
    for (int i = 0; i < 15; i++)
    {
        la1.AddLabel(sX[i].ToString(),i);
    }
    la1.Label = "时间";
    la1.TickTextFont = new Font("Courier New", 10);
    la1.TicksBetweenText = true;
    this.myPlot.XAxis1 = la1;
    /////区域着色////////          
    FilledRegion fr = new FilledRegion(newVerticalLine(1.2),new VerticalLine(2.4));
    //两条线之间的区域： FilledRegion fr = new FilledRegion(lp1, lp2);
    fr.Brush = Brushes.BlanchedAlmond;
    this.myPlot.Add(fr);
   //////画箭头//////////
    ArrowItem a = new ArrowItem(new PointD(2, 4),360-(30-90),"Arrow");
    a.HeadOffset = 5;
    a.ArrowColor = Color.Red;
    a.TextColor = Color.Purple;
    this.myPlot.Add(a);

    this.myPlot.Refresh();
}