Eigen convert dense matrix to sparse one
c++, eigen, matrix, sparse-matrix
Solution
you can use the sparseView() method for that:
`sparse = dense.sparseView();`
and even specify a tolerance:
`sparse = dense.sparseView(reference,epsilon);`
Problem
How to convert an `Eigen::Matrix<double,Dynamic,Dynamic>` to an `Eigen::SparseMatrix<double>` ? I'm looking for a better way instead of iterate through the dense matrix