CGeneralizedBellShapedMembershipFunction

通过A，B和C参数实施广义钟型归属函数的类。

描述

广义钟型归属函数的形状类似于高斯函数。该函数是平滑型，根据整个定义区域行使非零值。  

绘制图表的示例代码显示如下。

声明

   class CGeneralizedBellShapedMembershipFuncion : public IMembershipFunction

主题

   #include <Math\Fuzzy\membershipfunction.mqh>
继承体系   CObject       IMembershipFunction           CGeneralizedBellShapedMembershipFunction

类方法

类方法   描述
A 获取和设置归属函数的集中度比率。
B 获取和设置归属函数的倾斜度比率。
С 获取和设置归属函数的最大坐标值。
GetValue 通过指定自变数计算归属函数值。
方法继承自类 CObject Prev, Prev, Next, Next, Save, Load, Type, Compare

示例

//+------------------------------------------------------------------+

//|                      GeneralizedBellShapedMembershipFunction.mq5 |

//|                        Copyright 2016, MetaQuotes Software Corp. |

//|                                             https://www.mql5.com |

//+------------------------------------------------------------------+

#include <Math\Fuzzy\membershipfunction.mqh>

#include <Graphics\Graphic.mqh>

//--- 创建归属函数

CGeneralizedBellShapedMembershipFunction func1(5, 1, 3);

CGeneralizedBellShapedMembershipFunction func2(5, 2, 3);

CGeneralizedBellShapedMembershipFunction func3(5, 3, 3);

//--- 创建归属函数包装程序

double GeneralizedBellShapedMembershipFunction1(double x) { return(func1.GetValue(x)); }

double GeneralizedBellShapedMembershipFunction2(double x) { return(func2.GetValue(x)); }

double GeneralizedBellShapedMembershipFunction3(double x) { return(func3.GetValue(x)); }

//+------------------------------------------------------------------+

//| 脚本程序起始函数                                                   |

//+------------------------------------------------------------------+

void OnStart()

  {

//--- 创建图形

   CGraphic graphic;

   if(!graphic.Create(0,"GeneralizedBellShapedMembershipFunction",0,30,30,780,380))

     {

      graphic.Attach(0,"GeneralizedBellShapedMembershipFunction");

     }

   graphic.HistoryNameWidth(70);

   graphic.BackgroundMain("GeneralizedBellShapedMembershipFunction");

   graphic.BackgroundMainSize(16);

//--- 创建曲线

   graphic.CurveAdd(GeneralizedBellShapedMembershipFunction1,0.0,10.0,0.1,CURVE_LINES,"[5, 1, 3]");

   graphic.CurveAdd(GeneralizedBellShapedMembershipFunction2,0.0,10.0,0.1,CURVE_LINES,"[5, 2, 3]");

   graphic.CurveAdd(GeneralizedBellShapedMembershipFunction3,0.0,10.0,0.1,CURVE_LINES,"[5, 3, 3]");

//--- 设置X轴属性

   graphic.XAxis().AutoScale(false);

   graphic.XAxis().Min(0.0);

   graphic.XAxis().Max(10.0);

   graphic.XAxis().DefaultStep(1.0);

//--- 设置Y轴属性

   graphic.YAxis().AutoScale(false);

   graphic.YAxis().Min(0.0);

   graphic.YAxis().Max(1.1);

   graphic.YAxis().DefaultStep(0.2);

//--- 绘图

   graphic.CurvePlotAll();

   graphic.Update();

  }