FourierTransform Class Reference

#include <fft.hpp>

List of all members.

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Detailed Description

A class of discrete Fourier Transform.

FourierTransform class implements a Cooley–Tukey algorithm for fast matvec with DFT matrix and direct matvec for testing.

Definition at line 45 of file fft.hpp.

Public Types
enum	mv_mode { normal, conj }
	Type of matrix which will be use in operations: DFT or its conjugate. More...
Public Member Functions
	FourierTransform (unsigned _k)
	Initialize FourierTransform for DFT NxN matrix with N=2^k.
void	Matvec (const Complex *vec, Complex *res, mv_mode mode=normal) const
	Direct matvec DFT matrix with a vector.
void	MatvecFast (const Complex *vec, Complex *res, mv_mode mode=normal)
	Fast matvec DFT matrix with a vector.
	~FourierTransform ()
	The destructor.

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Member Enumeration Documentation

enum FourierTransform::mv_mode

Type of matrix which will be use in operations: DFT or its conjugate. Enumeration values: normal  conj  Definition at line 54 of file fft.hpp.

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Constructor & Destructor Documentation

FourierTransform::FourierTransform (  unsigned  _k  )

Initialize FourierTransform for DFT NxN matrix with N=2^k. Definition at line 74 of file fft.cpp.

FourierTransform::~FourierTransform (   )

The destructor. Definition at line 80 of file fft.cpp.

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Member Function Documentation

void FourierTransform::Matvec (  const Complex *  vec, Complex *  res, mv_mode  mode = normal )  const

Direct matvec DFT matrix with a vector. Parameters: vec  Complex vector size N to witch DFT will apply res  Complex vector size N where result will be save mode  Calc matvec with DFT matrix or DFT conjugate Definition at line 103 of file fft.cpp. References conj.

void FourierTransform::MatvecFast (  const Complex *  vec, Complex *  res, mv_mode  mode = normal )

Fast matvec DFT matrix with a vector. Parameters: vec  Complex vector size N to witch DFT will apply res  Complex vector size N where result will be save mode  Calc matvec with DFT matrix or DFT conjugate Definition at line 121 of file fft.cpp. References conj. Referenced by SmoluchowskiCalcFast::calc_L1(), SmoluchowskiCalcFast::calc_L1_fix_f(), SmoluchowskiCalcFast::calc_L2(), SmoluchowskiCalcFast::calc_L2_fix_f(), and SmoluchowskiCalcFast::fix_f_arg().

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

• fft.hpp
• fft.cpp

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