CODEWITHSUNDEEP
c++matrixeigen
Tarek
Tarek

Reputation: 1090

eigen library selfadjointView problem

I am persistently getting error messages whenever I try to use the selfadjointView property of any matrix or sparse matrix using the eigen library. Below is a simple code to check that. In my program I do try with self-adjoint matrix: 

#define EIGEN_YES_I_KNOW_SPARSE_MODULE_IS_NOT_STABLE_YET
#include <Eigen/Sparse>
#include <Eigen/Dense>
#include <Eigen/Core>
#include <iostream>

using namespace Eigen;
int main ()
{
SparseMatrix<float>  mat(3,3);
Matrix<float, 3, 1> vec;
std::cout<<mat.selfadjointView<>()*vec;
}

The error message I get is: error: no matching function for call to ‚'Eigen::SparseMatrix::selfadjointView()‚

Upvotes: 3

Views: 3241

Answers (1)

Jitse Niesen
Jitse Niesen

Reputation: 4532

You have to specify the template argument, so it should read mat.selfadjointView<Upper>() or mat.selfadjointView<Lower>() . The first one means that it should use the entries in the upper triangular part of mat and fill the lower triangular part to make the matrix self-adjoint. The second one is the other way around.

Upvotes: 3

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