In this article, you will find a fast generator for Random Variable, namely normal and exponential distributions. It is based on George Marsaglia's and Wai Wan Tsang's work.
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// HistogramDemoView.h : interface of the CHistogramDemoView class
//
/////////////////////////////////////////////////////////////////////////////
#if !defined(AFX_HISTOGRAMDEMOVIEW_H__43EAC3D4_72C1_4DE5_BD8E_AB317F99ED35__INCLUDED_)
#define AFX_HISTOGRAMDEMOVIEW_H__43EAC3D4_72C1_4DE5_BD8E_AB317F99ED35__INCLUDED_
#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
class CHistogramDemoView : public CView
{
protected: // create from serialization only
CHistogramDemoView();
DECLARE_DYNCREATE(CHistogramDemoView)
// Attributes
public:
CHistogramDemoDoc* GetDocument();
// Operations
public:
// Overrides
// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CHistogramDemoView)
public:
virtual void OnDraw(CDC* pDC); // overridden to draw this view
virtual BOOL PreCreateWindow(CREATESTRUCT& cs);
protected:
//}}AFX_VIRTUAL
// Implementation
public:
virtual ~CHistogramDemoView();
#ifdef _DEBUG
virtual void AssertValid() const;
virtual void Dump(CDumpContext& dc) const;
#endif
protected:
// Generated message map functions
protected:
//{{AFX_MSG(CHistogramDemoView)
// NOTE - the ClassWizard will add and remove member functions here.
// DO NOT EDIT what you see in these blocks of generated code !
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
};
#ifndef _DEBUG // debug version in HistogramDemoView.cpp
inline CHistogramDemoDoc* CHistogramDemoView::GetDocument()
{ return (CHistogramDemoDoc*)m_pDocument; }
#endif
/////////////////////////////////////////////////////////////////////////////
//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.
#endif // !defined(AFX_HISTOGRAMDEMOVIEW_H__43EAC3D4_72C1_4DE5_BD8E_AB317F99ED35__INCLUDED_)
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Jonathan de Halleux is Civil Engineer in Applied Mathematics. He finished his PhD in 2004 in the rainy country of Belgium. After 2 years in the Common Language Runtime (i.e. .net), he is now working at Microsoft Research on Pex (http://research.microsoft.com/pex).