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fourier.java
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fourier.java
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//import java.util.Scanner;
//package com.javatutorialhq.java.examples;
public class fourier {
/**
* @param args
*/
public static void main(String[] args) {
new fourier ();
}
public fourier ()
{
int bin =8;
double[] sample = new double[] {0, 0.707, 1, 0.707, 0, -0.707, -1, -0.707};
System.out.println ("Sample Values Used:");
for (int i=0; i<sample.length; i++){
System.out.println(sample[i]);
}
System.out.println("\n");
double sum=0;
//calculating real component (cosine function)
for (int i =0; i<bin; i++){
for (int j=0; j<sample.length; j++){//j = index of sample array
sum+=sample[j]*Math.cos(-2*(Math.PI)*i*j/(sample.length));
}
System.out.println ("X bin "+i+" = "+sum+" (real)");
sum=0;
}
sum=0;
System.out.println("\n\nImaginary Components");
//calculating imaginary component (sine function)
for (int i =0; i<bin; i++){
for (int j=0; j<sample.length; j++){//j = index of sample array
sum+=sample[j]*Math.sin(-2*(Math.PI)*i*j/(sample.length));
}
System.out.println ("X bin "+i+" = "+sum+"i");
sum=0;
}
}
}