23 lines
680 B
C++
23 lines
680 B
C++
#include <Eigen/Core>
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#include <iostream>
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using namespace Eigen;
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int main()
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{
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for (int size=1; size<=4; ++size)
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{
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MatrixXi m(size,size+1); // a (size)x(size+1)-matrix of int's
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for (int j=0; j<m.cols(); ++j) // loop over columns
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for (int i=0; i<m.rows(); ++i) // loop over rows
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m(i,j) = i+j*m.rows(); // to access matrix coefficients,
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// use operator()(int,int)
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std::cout << m << "\n\n";
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}
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VectorXf v(4); // a vector of 4 float's
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// to access vector coefficients, use either operator () or operator []
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v[0] = 1; v[1] = 2; v(2) = 3; v(3) = 4;
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std::cout << "\nv:\n" << v << std::endl;
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}
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