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FastDeploy/third_party/eigen/doc/snippets/Slicing_custom_padding_cxx11.cpp
Jack Zhou 355382ad63 Move eigen to third party (#282)
* remove useless statement

* Add eigen to third_party dir

* remove reducdant lines
2022-09-26 19:24:02 +08:00

15 lines
384 B
C++

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