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Add and update manual pages for slicing, indexing, and reshaping.

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This commit is contained in:
Gael Guennebaud
2018-11-09 11:35:27 +01:00
parent a368848473
commit d7c644213c
10 changed files with 365 additions and 66 deletions
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4
doc/snippets/Slicing_arrayexpr.cpp Normal file
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ArrayXi ind(5); ind<<4,2,5,5,3;
MatrixXi A = MatrixXi::Random(4,6);
cout << "Initial matrix A:\n" << A << "\n\n";
cout << "A(all,ind-1):\n" << A(all,ind-1) << "\n\n";

12
doc/snippets/Slicing_custom_padding_cxx11.cpp Normal file
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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";

5
doc/snippets/Slicing_rawarray_cxx11.cpp Normal file
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#if EIGEN_HAS_STATIC_ARRAY_TEMPLATE
MatrixXi A = MatrixXi::Random(4,6);
cout << "Initial matrix A:\n" << A << "\n\n";
cout << "A(all,{4,2,5,5,3}):\n" << A(all,{4,2,5,5,3}) << "\n\n";
#endif

4
doc/snippets/Slicing_stdvector_cxx11.cpp Normal file
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std::vector<int> ind{4,2,5,5,3};
MatrixXi A = MatrixXi::Random(4,6);
cout << "Initial matrix A:\n" << A << "\n\n";
cout << "A(all,ind):\n" << A(all,ind) << "\n\n";

5
doc/snippets/Tutorial_reshaped_vs_resize_1.cpp Normal file
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MatrixXi m = Matrix4i::Random();
cout << "Here is the matrix m:" << endl << m << endl;
cout << "Here is m.reshaped(2, 8):" << endl << m.reshaped(2, 8) << endl;
m.resize(2,8);
cout << "Here is the matrix m after m.resize(2,8):" << endl << m << endl;

6
doc/snippets/Tutorial_reshaped_vs_resize_2.cpp Normal file
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Matrix<int,Dynamic,Dynamic,RowMajor> m = Matrix4i::Random();
cout << "Here is the matrix m:" << endl << m << endl;
cout << "Here is m.reshaped(2, 8):" << endl << m.reshaped(2, 8) << endl;
cout << "Here is m.reshaped<AutoOrder>(2, 8):" << endl << m.reshaped<AutoOrder>(2, 8) << endl;
m.resize(2,8);
cout << "Here is the matrix m after m.resize(2,8):" << endl << m << endl;