text: 
  #include "MatrixMath.h"
  
  #include "CoolPropTools.h"
  #include "Exceptions.h"
  
  #include <string>
  #include <sstream>
  #include <vector>
  #include <numeric>
  #include <math.h>
  
  namespace CoolProp {}; /* namespace CoolProp */
  
  #ifdef ENABLE_CATCH
  #    include <math.h>
  #    include <iostream>
  #    include <catch2/catch_all.hpp>
  
  TEST_CASE("Internal consistency checks and example use cases for MatrixMath.h", "[MatrixMath]") {
      bool PRINT = false;
  
      /// Test case for "SylthermXLT" by "Dow Chemicals"
      std::vector<double> cHeat;
      cHeat.clear();
      cHeat.push_back(+1.1562261074E+03);
      cHeat.push_back(+2.0994549103E+00);
      cHeat.push_back(+7.7175381057E-07);
      cHeat.push_back(-3.7008444051E-20);
  
      std::vector<std::vector<double>> cHeat2D;
      cHeat2D.push_back(cHeat);
      cHeat2D.push_back(cHeat);
  
      SECTION("Pretty printing tests") {
  
          Eigen::MatrixXd matrix = Eigen::MatrixXd::Random(4, 1);
          std::string tmpStr;
          if (PRINT) std::cout << std::endl;
  
          CHECK_NOTHROW(tmpStr = CoolProp::vec_to_string(cHeat[0]));
          if (PRINT) std::cout << tmpStr << std::endl;
          CHECK_NOTHROW(tmpStr = CoolProp::vec_to_string(cHeat));
          if (PRINT) std::cout << tmpStr << std::endl;
          CHECK_NOTHROW(tmpStr = CoolProp::vec_to_string(cHeat2D));
          if (PRINT) std::cout << tmpStr << std::endl;
  
          CHECK_NOTHROW(tmpStr = CoolProp::mat_to_string(CoolProp::vec_to_eigen(cHeat[0])));
          if (PRINT) std::cout << tmpStr << std::endl;
          CHECK_NOTHROW(tmpStr = CoolProp::mat_to_string(CoolProp::vec_to_eigen(cHeat, 1)));
          if (PRINT) std::cout << tmpStr << std::endl;
          CHECK_THROWS(tmpStr = CoolProp::mat_to_string(CoolProp::vec_to_eigen(cHeat, 2)));
          if (PRINT) std::cout << tmpStr << std::endl;
          CHECK_NOTHROW(tmpStr = CoolProp::mat_to_string(CoolProp::vec_to_eigen(cHeat2D)));
          if (PRINT) std::cout << tmpStr << std::endl;
      }
  
      SECTION("Matrix modifications") {
          Eigen::MatrixXd matrix = CoolProp::vec_to_eigen(cHeat2D);
  
          if (PRINT) std::cout << CoolProp::mat_to_string(matrix) << std::endl;
  
          CHECK_NOTHROW(CoolProp::removeColumn(matrix, 1));
          if (PRINT) std::cout << CoolProp::mat_to_string(matrix) << std::endl;
  
          CHECK_NOTHROW(CoolProp::removeRow(matrix, 1));
          if (PRINT) std::cout << CoolProp::mat_to_string(matrix) << std::endl;
  
          CHECK_THROWS(CoolProp::removeColumn(matrix, 10));
          CHECK_THROWS(CoolProp::removeRow(matrix, 10));
      }
  
      SECTION("std::vector to Eigen::Matrix and back") {
          std::vector<std::vector<double>> vec2D(cHeat2D);
          Eigen::MatrixXd matrix = CoolProp::vec_to_eigen(vec2D);
          for (size_t i = 0; i < static_cast<size_t>(matrix.cols()); ++i) {
              for (size_t j = 0; j < static_cast<size_t>(matrix.rows()); ++j) {
                  CHECK(std::abs(matrix(j, i) - vec2D[j][i]) <= 1e-10);
              }
          }
          vec2D = CoolProp::eigen_to_vec(matrix);
          for (size_t i = 0; i < static_cast<size_t>(matrix.cols()); ++i) {
              for (size_t j = 0; j < static_cast<size_t>(matrix.rows()); ++j) {
                  CHECK(std::abs(matrix(j, i) - vec2D[j][i]) <= 1e-10);
              }
          }
          std::vector<double> vec1D(cHeat);
          matrix = CoolProp::vec_to_eigen(vec1D);
          for (size_t i = 0; i < static_cast<size_t>(matrix.cols()); ++i) {
              for (size_t j = 0; j < static_cast<size_t>(matrix.rows()); ++j) {
                  CHECK(std::abs(matrix(j, i) - vec1D[j]) <= 1e-10);
              }
          }
          vec1D = CoolProp::eigen_to_vec1D(matrix);
          for (size_t i = 0; i < static_cast<size_t>(matrix.cols()); ++i) {
              for (size_t j = 0; j < static_cast<size_t>(matrix.rows()); ++j) {
                  CHECK(std::abs(matrix(j, i) - vec1D[j]) <= 1e-10);
              }
          }
      }
  }
  
  #endif /* ENABLE_CATCH */
  
  //#include <unsupported/Eigen/Polynomials>
  //#include <iostream>
  ////using namespace Eigen;
  ////using namespace std;
  //
  //#include <vector>
  //#include <string>
  //#include <MatrixMath.h>
  //
  //int main()
  //{
  //Eigen::Vector4d roots = Eigen::Vector4d::Random();
  //std::cout << "Roots: " << roots.transpose() << std::endl;
  //Eigen::Matrix<double,5,1> polynomial;
  //Eigen::roots_to_monicPolynomial( roots, polynomial );
  //std::cout << "Polynomial: ";
  //for( int i=0; i<4; ++i ){ std::cout << polynomial[i] << ".x^" << i << "+ "; }
  //std::cout << polynomial[4] << ".x^4" << std::endl;
  //Eigen::Vector4d evaluation;
  //for( int i=0; i<4; ++i ){
  //evaluation[i] = Eigen::poly_eval( polynomial, roots[i] ); }
  //std::cout << "Evaluation of the polynomial at the roots: " << evaluation.transpose() << std::endl;
  //std::cout << std::endl;
  ////
  ////Eigen::MatrixXd coeffs = Eigen::MatrixXd::Random(5,1);
  ////Eigen::MatrixXd input  = Eigen::MatrixXd::Random(2,1)*1e0;
  //Eigen::Vector4d coeffs = Eigen::Vector4d::Random()*1e2;
  //double input  = 1.9e0;
  //std::cout << "Coeffs: " << std::endl << coeffs.transpose() << std::endl;
  //double eval = Eigen::poly_eval( coeffs, input);
  //std::cout << "Evaluation of the polynomial at " << input << std::endl;
  //std::cout << eval << std::endl;
  //
  //double vec0 = 0.1;
  //std::vector<double> vec1(2,0.44);
  //std::vector< std::vector<double> > vec2;
  //vec2.push_back(std::vector<double>(2,0.2));
  //vec2.push_back(std::vector<double>(2,0.3));
  //
  //std::cout << CoolProp::vec_to_string(vec0) << std::endl;
  //std::cout << CoolProp::vec_to_string(vec1) << std::endl;
  //std::cout << CoolProp::vec_to_string(vec2) << std::endl;
  //
  //Eigen::Matrix<double,2,2> mat;
  //mat.setConstant(2,2,0.25);
  //std::vector< std::vector<double> > vec;
  //
  //CoolProp::convert(mat, vec);
  //std::cout << CoolProp::vec_to_string(vec) << std::endl;
  //
  ////Eigen::Matrix<double,Eigen::Dynamic,Eigen::Dynamic> mat;
  ////mat.resize(6,2);
  //
  //Eigen::Matrix<double,2,2> mat2;
  //CoolProp::convert(vec2, mat2);
  //CoolProp::convert(mat2, vec);
  //std::cout << CoolProp::vec_to_string(vec) << std::endl;
  //
  //Eigen::Matrix<double,2,1> mat1;
  //CoolProp::convert(vec1, mat1);
  //std::vector<double> vec3;
  //CoolProp::convert(mat1, vec);
  //std::cout << CoolProp::vec_to_string(vec) << std::endl;
  //
  ////std::vector< std::vector<double> > vec(vec2);
  ////CoolProp::convert(mat,vec);
  //
  ////std::cout << CoolProp::vec_to_string() << std::endl;
  //
  ////Eigen::Matrix2d mat2 = CoolProp::convert(vec2);
  //
  ////Eigen::MatrixXd mat2(10,10);
  ////CoolProp::convert(vec2, mat2);
  //
  ////std::cout << CoolProp::vec_to_string(CoolProp::convert(mat2)) << std::endl;
  //
  //}
  