拉丁超立方抽样 Latin hypercube sampling,java 代码
时间: 2023-12-03 22:47:24 浏览: 176
以下是使用Java实现拉丁超立方抽样的示例代码:
```java
import java.util.*;
public class LatinHypercubeSampling {
public static void main(String[] args) {
int n = 10; // 样本数量
int m = 5; // 变量数量
double[][] samples = generateLatinHypercubeSamples(n, m);
for (int i = 0; i < n; i++) {
System.out.println(Arrays.toString(samples[i]));
}
}
public static double[][] generateLatinHypercubeSamples(int n, int m) {
double[][] samples = new double[n][m];
Random rand = new Random();
double[] intervals = new double[n + 1];
double delta = 1.0 / n;
for (int i = 0; i <= n; i++) {
intervals[i] = i * delta;
}
for (int j = 0; j < m; j++) {
for (int i = 0; i < n; i++) {
double randValue = intervals[i] + rand.nextDouble() * delta;
samples[i][j] = randValue;
}
shuffle(samples, j);
}
return samples;
}
public static void shuffle(double[][] samples, int j) {
Random rand = new Random();
for (int i = samples.length - 1; i > 0; i--) {
int index = rand.nextInt(i + 1);
double temp = samples[index][j];
samples[index][j] = samples[i][j];
samples[i][j] = temp;
}
}
}
```
说明:
- `generateLatinHypercubeSamples`方法用于生成拉丁超立方抽样,其中`n`为样本数量,`m`为变量数量。
- `shuffle`方法用于对每个变量的样本进行随机打乱,避免样本之间存在相关性。
- 示例代码中仅输出了样本结果,可以根据需要进行进一步处理。
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