Click here to Skip to main content
15,891,033 members
Articles / Programming Languages / C++

A Normal / Exponential Random Generator and Histogram Class

Rate me:
Please Sign up or sign in to vote.
4.73/5 (11 votes)
2 Dec 20024 min read 276.6K   8.1K   55  
A fast random generator with normal or exponential distribution + a histogram class
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.
// HistogramMatlabDlg.h : header file
//

#if !defined(AFX_HISTOGRAMMATLABDLG_H__74076A9A_C758_452E_B048_999BD0A491DE__INCLUDED_)
#define AFX_HISTOGRAMMATLABDLG_H__74076A9A_C758_452E_B048_999BD0A491DE__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

/////////////////////////////////////////////////////////////////////////////
// CHistogramMatlabDlg dialog

class CHistogramMatlabDlg : public CDialog
{
// Construction
public:
	CHistogramMatlabDlg(CWnd* pParent = NULL);	// standard constructor

// Dialog Data
	//{{AFX_DATA(CHistogramMatlabDlg)
	enum { IDD = IDD_HISTOGRAMMATLAB_DIALOG };
	//}}AFX_DATA

	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CHistogramMatlabDlg)
	protected:
	virtual void DoDataExchange(CDataExchange* pDX);	// DDX/DDV support
	//}}AFX_VIRTUAL

// Implementation
protected:
	void ErrHandler(HRESULT hr, EXCEPINFO excep, UINT uArgErr);
	static enum ERandType
	{
		ENormal = 1,
		EExponential = 2
	} ;

	void ShowHistogram(ERandType eType, UINT nSteps = 100);

protected:
	HICON m_hIcon;

	// Generated message map functions
	//{{AFX_MSG(CHistogramMatlabDlg)
	virtual BOOL OnInitDialog();
	afx_msg void OnSysCommand(UINT nID, LPARAM lParam);
	afx_msg void OnPaint();
	afx_msg HCURSOR OnQueryDragIcon();
	afx_msg void OnButton1();
	afx_msg void OnButton2();
	//}}AFX_MSG
	DECLARE_MESSAGE_MAP()
};

//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_HISTOGRAMMATLABDLG_H__74076A9A_C758_452E_B048_999BD0A491DE__INCLUDED_)

By viewing downloads associated with this article you agree to the Terms of Service and the article's licence.

If a file you wish to view isn't highlighted, and is a text file (not binary), please let us know and we'll add colourisation support for it.


Written By
Engineer
United States United States
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).

Comments and Discussions