C# 使用NPlot绘图技巧 转
C# 使用NPlot绘图技巧
(2010-07-05 19:14:05)///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 (Exception MyEx)
{
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(new
NPlot.Windows.PlotSurface2D.Interactions.HorizontalDrag());
this.myPlot.AddInteraction(new
NPlot.Windows.PlotSurface2D.Interactions.VerticalDrag());
this.myPlot.AddInteraction(new
NPlot.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, new Pen(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(new
NPlot.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(new VerticalLine(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();
}
