如何在ZedGraph直方图中设置不同的颜色？ [英] How can I set different colors in a ZedGraph histogram?

问题描述

我在ZedGraph中绘制了直方图。我必须为特定范围的值设置特定的颜色。例如：

 图形窗格= zedGraph.GraphPane; 
 list = new PointPairList（）; 
 for（int i = 0; i <256; i ++）
 {
 list.Add（i，array_with_y_values [i]）; 
} 
 Pane.AddBar（，list，Color.Red）; 
  

我如何设置其他颜色？

解决方案

你在找这样的东西吗？这段代码添加50个条，其中随机y值在0和15之间。它将彩色条的y值<5作为红色，5-10作为黄色，> 10作为绿色。

  GraphPane pane = zedGraphControl1.GraphPane; 
 PointPairList list = new PointPairList（）; 
 Random rand = new Random（）; 
 
 for（int i = 0; i <50; i ++）
 {
 list.Add（i，rand.Next（15））; 
} 
 
 BarItem myBar = pane.AddBar（，list，Color.Red）; 
 Color [] colors = {Color.Red，Color.Yellow，Color.Green}; 
 myBar.Bar.Fill = new Fill（colors）; 
 myBar.Bar.Fill.Type = FillType.GradientByY; 
 myBar.Bar.Fill.RangeMin = 5; 
 myBar.Bar.Fill.RangeMax = 10; 
 
 zedGraphControl1.AxisChange（）; 
  

这是ZedGraph的修改示例： http://www.zedgraph.org/wiki/index.php?title=Multi-Colored_Bar_Demo

I got a histogram drawn in ZedGraph. And I have to set the specific color for a specific range of the values. For example:

Graph Pane = zedGraph.GraphPane;    
list = new PointPairList ();    
for (int i = 0; i < 256; i++)
{    
    list.Add(i, array_with_y_values[i]);    
}    
Pane.AddBar("", list, Color.Red);

And how I can set the other color for some of them?

解决方案

Are you looking for something like this? This piece of code adds 50 bars with random y values between 0 and 15. It will color bars with y values <5 as red, 5-10 as yellow, and >10 as green.

GraphPane pane = zedGraphControl1.GraphPane;
PointPairList list = new PointPairList();
Random rand = new Random();

for (int i = 0; i < 50; i++)
{
    list.Add(i, rand.Next(15));
}

BarItem myBar = pane.AddBar("", list, Color.Red);
Color[] colors = { Color.Red, Color.Yellow, Color.Green };
myBar.Bar.Fill = new Fill(colors);
myBar.Bar.Fill.Type = FillType.GradientByY;
myBar.Bar.Fill.RangeMin = 5;
myBar.Bar.Fill.RangeMax = 10;

zedGraphControl1.AxisChange();

This is a modified example of the ZedGraph one here: http://www.zedgraph.org/wiki/index.php?title=Multi-Colored_Bar_Demo

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