13 lines
369 B
C++
13 lines
369 B
C++
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struct pad {
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Index size() const { return out_size; }
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Index operator[] (Index i) const { return std::max<Index>(0,i-(out_size-in_size)); }
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Index in_size, out_size;
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};
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Matrix3i A;
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A.reshaped() = VectorXi::LinSpaced(9,1,9);
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cout << "Initial matrix A:\n" << A << "\n\n";
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MatrixXi B(5,5);
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B = A(pad{3,5}, pad{3,5});
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cout << "A(pad{3,N}, pad{3,N}):\n" << B << "\n\n";
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