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()
al gore{
// --- Plotting ---
plot.Clear();
// --- Grid Code ---
Grid mygrid = new Grid();
计算机英语教程 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 = fal;
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：/nplot/wiki/index.php?n=Main.HomePage
NPlot的开发文档：/nplot/
E_mail： 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 = new LinePlot();
/////横坐标赋值
lp.AbscissaData = x;//new double[] { 0, 25,125 };
/////纵坐标赋值
lp.OrdinateData = y;//new double[] { 200, 200, 0};
//StepPlot line = new StepPlot();
//line.Pen = new Pen(Color.Red, 1);
//line.OrdinateData = new double[] { 5.5, 4.0, 1.5, 2.5, 3.5 };
//line.HideVerticalSegments = fal;
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 = new ArrayList();
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 = new BarPlot();
storeGrowth.AbscissaData = dates;
storeGrowth.OrdinateDataTop = a;
storeGrowth.OrdinateDataBottom = ab;
storeGrowth.FillBrush = NPlot.RectangleBrushes.Solid.Red;
//storeGrowth.BorderPen = new Pen( Color.Black, 2.0f );
myPlot.Add(storeGrowth);
//标签
LabelPointPlot tp1 = new LabelPointPlot();
tp1.AbscissaData = dates;
tp1.OrdinateData = a;
tp1.TextData = b;
tp1.LabelTextPosition = LabelPointPlot.LabelPositions.Above;
tp1.Marker = new Marker(Marker.MarkerType.None, 10);
myPlot.Add(tp1);
//lp.
lp.DataSource = a;
lp.Pen = new Pen(Color.Blue, 3.0f);
lp.Label = "Gaussian Function";
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(new NPlot.Windows.PlotSurface2D.Interactions.Horizon
talDrag());
//myPlot.AddInteraction(new NPlot.Windows.PlotSurface2D.Interactions.VerticalDrag());
myPlot.AddInteraction(new NPlot.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);ufi
}
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(*.*)|*.*";
immif (saveFileDialog1.ShowDialog() == DialogResult.OK)
{
try
{
int h = myPlot.Size.Height;
山木培训网站 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);
榆耳 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)
汉堡包的英文 {
bm.Save(saveFileDialog1.FileName, ImageFormat.Gif);
}
if (saveFileDialog1.FilterIndex == 4)
{
bm.Save(saveFileDialog1.FileName, ImageFormat.Tiff);英语通知范文
kissgoodbye歌词}
if (saveFileDialog1.FilterIndex == 5)
{
bm.Save(saveFileDialog1.FileName, ImageFormat.Png);
}
if (saveFileDialog1.FilterIndex == 6)
{
bm.Save(saveFileDialog1.FileName, ImageFormat.Exif);
}
}
catch (Exception MyEx)
{
MessageBox.Show(MyEx.ToString(), "错误提示", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
}
arch engine optimization}
