c++ SVD矩阵计算
时间: 2023-12-22 10:30:14 浏览: 80
以下是两种C++中使用Eigen库进行SVD矩阵计算的例子:
1. 使用Matrix3d和Vector3d进行SVD计算:
```cpp
#include <iostream>
#include <Eigen/Dense>
using namespace Eigen;
using namespace std;
int main() {
Matrix3d m = Matrix3d::Random();
JacobiSVD<Matrix3d> svd(m, ComputeThinU | ComputeThinV);
cout << "Singular values: " << svd.singularValues() << endl;
cout << "U matrix: " << svd.matrixU() << endl;
cout << "V matrix: " << svd.matrixV() << endl;
return 0;
}
```
2. 使用MatrixXd和VectorXd进行SVD计算:
```cpp
#include <iostream>
#include <Eigen/Dense>
using namespace Eigen;
using namespace std;
int main() {
MatrixXd m = MatrixXd::Random(3, 3);
JacobiSVD<MatrixXd> svd(m, ComputeThinU | ComputeThinV);
cout << "Singular values: " << svd.singularValues() << endl;
cout << "U matrix: " << svd.matrixU() << endl;
cout << "V matrix: " << svd.matrixV() << endl;
return 0;
}
```
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