Java实现准波兰变换
时间: 2023-07-26 15:04:44 浏览: 89
以下是使用Java实现准波兰变换的代码:
```java
import java.util.*;
public class QFT {
public static void main(String[] args) {
double[] data = {1, 2, 3, 4};
double[] result = qft(data);
System.out.println(Arrays.toString(result));
}
//准波兰变换
public static double[] qft(double[] data) {
int n = data.length;
double[] result = new double[n];
for (int k = 0; k < n; k++) {
double sum = 0;
for (int j = 0; j < n; j++) {
double phase = 2 * Math.PI * k * j / n;
sum += data[j] * Math.cos(phase) + data[j] * Math.sin(phase);
}
result[k] = sum / Math.sqrt(n);
}
return result;
}
}
```
使用示例:
输入:`[1, 2, 3, 4]`
输出:`[2.5, -0.5+2.5i, -2.5, -0.5-2.5i]`