1c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamathtypedef Matrix<float,1,Dynamic> MatrixType; 2c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamathtypedef Map<MatrixType> MapType; 3c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamathtypedef Map<const MatrixType> MapTypeConst; // a read-only map 4c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamathconst int n_dims = 5; 5c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath 6c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan KamathMatrixType m1(n_dims), m2(n_dims); 7c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamathm1.setRandom(); 8c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamathm2.setRandom(); 9c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamathfloat *p = &m2(0); // get the address storing the data for m2 10c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan KamathMapType m2map(p,m2.size()); // m2map shares data with m2 11c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan KamathMapTypeConst m2mapconst(p,m2.size()); // a read-only accessor for m2 12c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath 13c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamathcout << "m1: " << m1 << endl; 14c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamathcout << "m2: " << m2 << endl; 15c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamathcout << "Squared euclidean distance: " << (m1-m2).squaredNorm() << endl; 16c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamathcout << "Squared euclidean distance, using map: " << 17c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath (m1-m2map).squaredNorm() << endl; 18c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamathm2map(3) = 7; // this will change m2, since they share the same array 19c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamathcout << "Updated m2: " << m2 << endl; 20c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamathcout << "m2 coefficient 2, constant accessor: " << m2mapconst(2) << endl; 21c981c48f5bc9aefeffc0bcb0cc3934c2fae179ddNarayan Kamath/* m2mapconst(2) = 5; */ // this yields a compile-time error 22