CZ_ShapedMembershipFunction

通过A和B参数实施z-like归属函数的类。  

描述

该函数设置z-like双参数归属函数。这是一个选取1到0值的非递增归属函数。该函数参数定义了函数递减从1到0的非线型轨迹的间隔。

该函数表示“非常低”类型的模糊集。换句话说,它通过饱和度设置了非递增归属函数。

绘制图表的示例代码显示如下。

声明

   class CZ_ShapedMembershipFuncion : public IMembershipFunction

主题

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

类方法

类方法   描述
A 获取和设置减少间隔的开始参数。
B 获取和设置减少间隔的结束参数。
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

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

//|                                   Z_ShapedMembershipFunction.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

CZ_ShapedMembershipFunction func1(2,1);

CZ_ShapedMembershipFunction func2(2,5);

CZ_ShapedMembershipFunction func3(2,9);

//--- 创建归属函数包装程序

double Z_ShapedMembershipFunction1(double x) { return(func1.GetValue(x)); }

double Z_ShapedMembershipFunction2(double x) { return(func2.GetValue(x)); }

double Z_ShapedMembershipFunction3(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,"Z_ShapedMembershipFunction",0,30,30,780,380))

     {

      graphic.Attach(0,"Z_ShapedMembershipFunction");

     }

   graphic.HistoryNameWidth(70);

   graphic.BackgroundMain("Z_ShapedMembershipFunction");

   graphic.BackgroundMainSize(16);

//--- 创建曲线

   graphic.CurveAdd(Z_ShapedMembershipFunction1,0.0,10.0,0.1,CURVE_LINES,"[2, 1]");

   graphic.CurveAdd(Z_ShapedMembershipFunction2,0.0,10.0,0.1,CURVE_LINES,"[2, 5]");

   graphic.CurveAdd(Z_ShapedMembershipFunction3,0.0,10.0,0.1,CURVE_LINES,"[2, 9]");

//--- 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();

  }