I've tried to compile following code:

Code: Select all

#include <iostream>
#include <Eigen/Dense>
#include <Eigen/LU>
using namespace std;
using namespace Eigen;

int main()
{
   MatrixXd A(3,3);
   A << 2, 1, 3,
       2, 6, 8,
       6, 8, 18;
   Vector3d b(1, 3, 5);
   VectorXd x(3);
   A.lu().solve(b, &x);
   cout << x;
   return 0;
}


I get an error in line 15. I'm using Dev C++. The error report is:

[Error] no matching function for call to 'Eigen::PartialPivLU<Eigen::Matrix<double, -0x000000001, -0x000000001> >::solve(Eigen::Vector3d&, Eigen::VectorXd*) const'

I guess it's something simple enough but I'm just starting using Eigen.

hm, you probably looked at the Eigen2 documentation. The API is:

x = A.lu().solve(b);