Diffpack Documentation

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FFT Class Reference

Fast Fourier sine and cosine transforms. More...

#include <FFT.h>

List of all members.

Static Public Methods
void	sinft (VecSimple(real) &y, int n, int iflag)
void	cosft (VecSimple(real) &y, int n)

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Detailed Description

Fast Fourier sine and cosine transforms.

NAME: FFT - Fast Fourier sine and cosine transforms

DESCRIPTION:

The class is just a collection of 'static' functions for fast Fourier transforms. The algorithms are taken from Numerical Recipes, 2nd edition, rewritten in C++ and adapted to the Diffpack system.

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Member Function Documentation

static void FFT::cosft ( VecSimple(real) & y, int n ) [static]

calculates the cosine transform of a set "y" of "n+1" real-valued data points. The transformed data replace the original data in array "y". "n" must be a power of 2.

static void FFT::sinft ( VecSimple(real) & y, int n, int iflag ) [static]

calculates the sine transform of a set "y" of "n" real-valued data points. "y(1)=0". The transformed data replace the original data in array "y". "n" must be a power of 2. If "iflag" is 1, it means inverse transform.

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

• FFT.h

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