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freqtest.cpp File Reference

This file contains code to test wavelet frequency analysis via wavelet packets. More...

#include <assert.h>
#include <stdio.h>
#include "packcontainer.h"
#include "haar_classicFreq.h"
#include "daub.h"
#include "packfreq.h"

Go to the source code of this file.

Functions
void	gen_freqMix (double *vecX, double *vecY, size_t N)
	\function Generate a signal composed of a sum of sine waves. More...
void	gen_sinCombo (double *vecX, double *vecY, size_t N)
	\function Generate a signal composed of one or more sine waves. More...
void	gen_steps (double *vecX, double *vecY, size_t N, size_t steps)
	\function Generate a signal that increases in frequency by steps. More...
void	gen_chirp (double *vecX, double *vecY, size_t N)
	\function Generate a linear chirp signal. More...
void	prCoords (double *vecX, double *vecY, size_t len)
	\function. More...
void	prVec (double *vec, size_t len)
	\function Print a vector of doubles. More...
int	main ()
	\function. More...
Variables
double	data []
	Some small data sets. More...

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Detailed Description

This file contains code to test wavelet frequency analysis via wavelet packets.

See http://www.bearcave.com/misl/misl_tech/wavelets/packfreq/index.html

The documentation in this file is formatted for doxygen (see www.doxygen.org).

Copyright and Use

You may use this source code without limitation and without fee as long as you include: This software was written and is copyrighted by Ian Kaplan, Bear Products International, www.bearcave.com, 2002.

This software is provided "as is", without any warranty or claim as to its usefulness. Anyone who uses this source code uses it at their own risk. Nor is any support provided by Ian Kaplan and Bear Products International.

Please send any bug fixes or suggested source changes to:

     iank@bearcave.com

Author:

Ian Kaplan

Definition in file freqtest.cpp.

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Function Documentation

void gen_chirp ( double * vecX, double * vecY, size_t N )

\function Generate a linear chirp signal. Definition at line 152 of file freqtest.cpp. { const double PI = 3.1415926535897932384626433832795; const double range = 2; // const double range = 16 * PI; const double incr = range / (double)N; double point = 0.0; int i; for (i = 0; i < N; i++) { vecX[i] = point; vecY[i] = sin( 128 * PI * point * point ); // printf("x[%2d] = %7.4g, y[%2d] = %7.4g\n", i, vecX[i], i, vecY[i] ); // printf("%7.4g, %7.4g\n", vecX[i], vecY[i] ); // printf("%d, %7.4g\n", i, vecY[i] ); point = point + incr; } }

void gen_freqMix ( double * vecX, double * vecY, size_t N )

\function Generate a signal composed of a sum of sine waves. The sine waves summed are in decreasing magnitude and decreasing frequency. Definition at line 67 of file freqtest.cpp. Referenced by main(). { const double PI = 3.1415926535897932384626433832795; const double range = 2 * PI; const double incr = range / (double)N; double point = 0.0; int i; for (i = 0; i < N; i++) { vecX[i] = point; vecY[i] = 4 * sin( 64 * point ) + 2 * sin( 32 * point ) + 1 * sin( 16 * point ) + 0.5 * sin( 8 * point ); // printf("%7.4g, %7.4g\n", vecX[i], vecY[i] ); point = point + incr; } } // gen_freqMix

void gen_sinCombo ( double * vecX, double * vecY, size_t N )

\function Generate a signal composed of one or more sine waves. Definition at line 91 of file freqtest.cpp. { const double PI = 3.1415926535897932384626433832795; const double range = 8 * PI; const double incr = range / (double)N; double point = 0.0; int stepCnt = 0; int i; for (i = 0; i < N; i++) { vecX[i] = point; // vecY[i] = sin( 64 * point ) + sin( 32 * point ) + sin( 16 * point ); // vecY[i] = sin( 16 * PI * point ) + sin( 4 * PI * point ); vecY[i] = sin( 4 * PI * point ); // printf("x[%2d] = %7.4g, y[%2d] = %7.4g\n", i, vecX[i], i, vecY[i] ); // printf("%7.4g, %7.4g\n", vecX[i], vecY[i] ); // printf("%d, %7.4g\n", i, vecY[i] ); point = point + incr; } }

void gen_steps ( double * vecX, double * vecY, size_t N, size_t steps )

\function Generate a signal that increases in frequency by steps. Definition at line 119 of file freqtest.cpp. { const double PI = 3.1415926535897932384626433832795; const double range = 32 * PI; const double incr = range / (double)N; double point = 0.0; double mult = 1; const size_t stepWidth = N / steps; int stepCnt = 0; int i; for (i = 0; i < N; i++) { vecX[i] = point; vecY[i] = sin( mult * point ); // printf("x[%2d] = %7.4g, y[%2d] = %7.4g\n", i, vecX[i], i, vecY[i] ); // printf("%7.4g, %7.4g\n", vecX[i], vecY[i] ); // printf("%d, %7.4g\n", i, vecY[i] ); point = point + incr; stepCnt++; if (stepCnt == stepWidth) { mult = mult + (PI/2.0); stepCnt = 0; } } }

main ( )

\function. The entry point for code to test the wavelet packet transform. The code in main provides a simple example of how to call the wavelet packet transform code. Definition at line 207 of file freqtest.cpp. { const size_t N = 1024; // const size_t N = sizeof( data ) / sizeof( double ); double vecX[N], vecY[N]; // gen_chirp( vecX, vecY, N ); // gen_steps( vecX, vecY, N, 8 ); gen_freqMix( vecX, vecY, N ); // gen_sinCombo( vecX, vecY, N ); // prVec( vecY, N ); // prCoords( vecX, vecY, N ); // The "Haar" classic transform haar_classicFreq<packcontainer> h; // Daubechies<packcontainer> h; // calculate the wavelet packet tree, using the wavelet transform h packfreq tree( vecY, N, &h ); // packfreq tree( data, N, &h ); // tree.pr(); // printf("\n"); tree.getLevel( 5 ); tree.plotMat(N); // free the memory pool block_pool mem_pool; mem_pool.free_pool(); return 0; }

void prCoords ( double * vecX, double * vecY, size_t len )

\function. Print a vector of doubles whose length is len. Definition at line 179 of file freqtest.cpp. { for (int i = 0; i < len; i++) { printf("%7.4f %7.4f\n", vecX[i], vecY[i] ); } }

void prVec ( double * vec, size_t len )

\function Print a vector of doubles. Print a vector of doubles whose length is len. Definition at line 190 of file freqtest.cpp. { for (int i = 0; i < len; i++) { printf("%4d %7.4f\n", i, vec[i] ); } } // prVec

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Variable Documentation

double data

Initial value: { 32.0, 10.0, 20.0, 38.0, 37.0, 28.0, 38.0, 34.0, 18.0, 24.0, 18.0, 9.0, 23.0, 24.0, 28.0, 34.0 } Some small data sets. Definition at line 60 of file packtest.cpp.

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