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PosGen Class Reference

#include <newran.h>

Inheritance diagram for PosGen:

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Collaboration diagram for PosGen:

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Public Member Functions

char * Name ()
 PosGen ()
virtual ~PosGen ()
Real Next ()
ExtReal Mean () const
ExtReal Variance () const

Protected Member Functions

void Build (bool)

Protected Attributes

Real xi
Real * sx
Real * sfx
bool NotReady

Private Member Functions

void operator= (const PosGen &)

Constructor & Destructor Documentation

PosGen::PosGen (   ) 
 

Definition at line 184 of file newran.cpp.

References NotReady, and tron. 

00185 {
00186    #ifdef MONITOR
00187       tron << "constructing PosGen\n";
00188    #endif
00189    NotReady=true;
00190 }

PosGen::~PosGen (   )  [virtual]
 

Definition at line 192 of file newran.cpp.

References NotReady, sfx, sx, and tron. 

00193 {
00194    if (!NotReady)
00195    {
00196       #ifdef MONITOR
00197          tron << "freeing PosGen arrays\n";
00198       #endif
00199       delete [] sx; delete [] sfx;
00200    }
00201    #ifdef MONITOR
00202       tron << "destructing PosGen\n";
00203    #endif
00204 }

Member Function Documentation

void PosGen::Build (  bool   )  [protected]
 

Definition at line 206 of file newran.cpp.

References Random::Density(), ErrorNoSpace(), NotReady, Real, sfx, sx, tron, and xi.

Referenced by SymGen::Next(), Next(), and Normal::Normal(). 

00207 {
00208    #ifdef MONITOR
00209       tron << "building PosGen arrays\n";
00210    #endif
00211    int i;
00212    NotReady=false;
00213    sx=new Real[60]; sfx=new Real[60];
00214    if (!sx || !sfx) ErrorNoSpace();
00215    Real sxi=0.0; Real inc = sym ? 0.01 : 0.02;
00216    for (i=0; i<60; i++)
00217    {
00218       sx[i]=sxi; Real f1=Density(sxi); sfx[i]=f1;
00219       if (f1<=0.0) goto L20;
00220       sxi+=inc/f1;
00221    }
00222    Throw(Runtime_error("Newran: area too large"));
00223 L20:
00224    if (i<50) Throw(Runtime_error("Newran: area too small"));
00225    xi = sym ? 2*i : i;
00226    return;
00227 }

ExtReal PosGen::Mean (   )  const [inline, virtual]
 

Reimplemented from Random.

Reimplemented in ChiSq1, Gamma1, Normal, Cauchy, and Exponential.

Definition at line 109 of file newran.h.

References Missing. 

00109 { return (ExtReal)Missing; }

char * PosGen::Name (   )  [virtual]
 

Reimplemented from Random.

Reimplemented in SymGen, Normal, Cauchy, Exponential, PosGenX, and SymGenX.

Definition at line 905 of file newran.cpp. 

00905 { return "PosGen";           }

Real PosGen::Next (   )  [virtual]
 

Reimplemented from Random.

Reimplemented in ChiSq1, Gamma1, and SymGen.

Definition at line 229 of file newran.cpp.

References Build(), Random::Density(), Random::Next(), NotReady, Real, sfx, sx, and xi.

Referenced by Gamma1::Next(). 

00230 {
00231    Real ak,y; int ir;
00232    if (NotReady) Build(false);
00233    do
00234    {
00235       Real r1=Random::Next();
00236       ir = (int)(r1*xi); Real sxi=sx[ir];
00237       ak=sxi+(sx[ir+1]-sxi)*Random::Next();
00238       y=sfx[ir]*Random::Next();
00239    }
00240    while ( y>=sfx[ir+1] && y>=Density(ak) );
00241    return ak;
00242 }

void PosGen::operator= (  const PosGen &   )  [inline, private]
 

Definition at line 97 of file newran.h. 

00097 {}       // private so can't access

ExtReal PosGen::Variance (   )  const [inline, virtual]
 

Reimplemented from Random.

Reimplemented in ChiSq1, Gamma1, Normal, Cauchy, and Exponential.

Definition at line 110 of file newran.h.

References Missing. 

00110 { return (ExtReal)Missing; }

Field Documentation

bool PosGen::NotReady [protected]
 

Definition at line 101 of file newran.h.

Referenced by Build(), SymGen::Next(), Next(), Normal::Normal(), PosGen(), Normal::~Normal(), and ~PosGen().

Real * PosGen::sfx [protected]
 

Definition at line 100 of file newran.h.

Referenced by Build(), SymGen::Next(), Next(), Normal::Normal(), and ~PosGen().

Real * PosGen::sx [protected]
 

Definition at line 100 of file newran.h.

Referenced by Build(), SymGen::Next(), Next(), Normal::Normal(), and ~PosGen().

Real PosGen::xi [protected]
 

Definition at line 100 of file newran.h.

Referenced by Build(), SymGen::Next(), Next(), and Normal::Normal().

The documentation for this class was generated from the following files:
Generated on Fri Dec 5 04:06:32 2003 for Borqueror by doxygen 1.3.3