const madness

src/Tests/eigenTest.cpp

@@ -0,0 +1,38 @@
+#include <unsupported/Eigen/Polynomials>
+#include <iostream>
+//using namespace Eigen;
+//using namespace std;
+
+#include <vector>
+#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;
+
+//std::vector<double> vec(2,0.2);
+//std::cout << CoolProp::vec_to_string(vec) << std::endl;
+
+std::cout << CoolProp::vec_to_string(0.3) << std::endl;
+
+}