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20 lines
635 B
20 lines
635 B
#include <unsupported/Eigen/Polynomials>
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#include <iostream>
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using namespace Eigen;
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using namespace std;
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int main()
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{
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Vector4d roots = Vector4d::Random();
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cout << "Roots: " << roots.transpose() << endl;
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Eigen::Matrix<double,5,1> polynomial;
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roots_to_monicPolynomial( roots, polynomial );
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cout << "Polynomial: ";
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for( int i=0; i<4; ++i ){ cout << polynomial[i] << ".x^" << i << "+ "; }
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cout << polynomial[4] << ".x^4" << endl;
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Vector4d evaluation;
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for( int i=0; i<4; ++i ){
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evaluation[i] = poly_eval( polynomial, roots[i] ); }
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cout << "Evaluation of the polynomial at the roots: " << evaluation.transpose();
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}
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