25 lines
440 B
C++
25 lines
440 B
C++
#include <iostream>
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#include <Eigen/Dense>
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using namespace std;
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using namespace Eigen;
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int main()
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{
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Eigen::MatrixXf m(2,4);
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Eigen::VectorXf v(2);
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m << 1, 23, 6, 9,
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3, 11, 7, 2;
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v << 2,
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3;
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MatrixXf::Index index;
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// find nearest neighbour
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(m.colwise() - v).colwise().squaredNorm().minCoeff(&index);
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cout << "Nearest neighbour is column " << index << ":" << endl;
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cout << m.col(index) << endl;
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}
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