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20 lines
594 B
C++
20 lines
594 B
C++
#include <Eigen/Dense>
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#include <iostream>
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using namespace std;
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using namespace Eigen;
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int main() {
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Matrix3f A;
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A << 1, 2, 5, 2, 1, 4, 3, 0, 3;
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cout << "Here is the matrix A:\n" << A << endl;
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FullPivLU<Matrix3f> lu_decomp(A);
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cout << "The rank of A is " << lu_decomp.rank() << endl;
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cout
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<< "Here is a matrix whose columns form a basis of the null-space of A:\n"
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<< lu_decomp.kernel() << endl;
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cout << "Here is a matrix whose columns form a basis of the column-space of "
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"A:\n"
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<< lu_decomp.image(A) << endl; // yes, have to pass the original A
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}
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