Genfun::DefiniteIntegral::Clockwork::TrapezoidQuadratureRule Class Reference

Inheritance diagram for Genfun::DefiniteIntegral::Clockwork::TrapezoidQuadratureRule:

Public Member Functions
	TrapezoidQuadratureRule ()
	~TrapezoidQuadratureRule ()
virtual double	integrate (const AbsFunction &function, double a, double b, unsigned int j) const
virtual unsigned int	stepMultiplier () const
virtual unsigned int	numFunctionCalls () const
Public Member Functions inherited from Genfun::DefiniteIntegral::Clockwork::QuadratureRule
	QuadratureRule ()
virtual	~QuadratureRule ()
virtual double	integrate (const AbsFunction &function, double a, double b, unsigned int j) const =0
virtual unsigned int	stepMultiplier () const =0
virtual unsigned int	numFunctionCalls () const =0

Detailed Description

Definition at line 48 of file DefiniteIntegral.cc.

Constructor & Destructor Documentation

TrapezoidQuadratureRule()

Genfun::DefiniteIntegral::Clockwork::TrapezoidQuadratureRule::TrapezoidQuadratureRule ( )

inline

Definition at line 53 of file DefiniteIntegral.cc.

:retVal(0),nFunctionCalls(0) {};

~TrapezoidQuadratureRule()

Genfun::DefiniteIntegral::Clockwork::TrapezoidQuadratureRule::~TrapezoidQuadratureRule ( )

inline

Definition at line 56 of file DefiniteIntegral.cc.

{};

Member Function Documentation

integrate()

double Genfun::DefiniteIntegral::Clockwork::TrapezoidQuadratureRule::integrate ( const AbsFunction &  function, double  a, double  b, unsigned int  j  ) const

virtual

Implements Genfun::DefiniteIntegral::Clockwork::QuadratureRule.

Definition at line 224 of file DefiniteIntegral.cc.

                                                                                                                                             {
    unsigned int it, j;
    if (n==1) {
      retVal = 0.5*(bb-aa)*(function(aa)+function(bb));
      nFunctionCalls+=2;
    }
    else { 
      for (it=1,j=1;j<n-1;j++)  it <<=1;
      double tnm=it;
      double del = (bb-aa)/tnm;
      double x=aa+0.5*del;
      double sum;
      for (sum=0.0,j=1;j<=it;j++,x+=del) {
    sum +=function(x);
    nFunctionCalls++;
      }
      retVal = 0.5*(retVal+(bb-aa)*sum/tnm);
    }
    return retVal;
  }

numFunctionCalls()

virtual unsigned int Genfun::DefiniteIntegral::Clockwork::TrapezoidQuadratureRule::numFunctionCalls ( ) const

inlinevirtual

Implements Genfun::DefiniteIntegral::Clockwork::QuadratureRule.

Definition at line 68 of file DefiniteIntegral.cc.

{return nFunctionCalls;};

stepMultiplier()

virtual unsigned int Genfun::DefiniteIntegral::Clockwork::TrapezoidQuadratureRule::stepMultiplier ( ) const

inlinevirtual

Implements Genfun::DefiniteIntegral::Clockwork::QuadratureRule.

Definition at line 65 of file DefiniteIntegral.cc.

{return 2;}

---

The documentation for this class was generated from the following file:

• DefiniteIntegral.cc