initial commit

third_party/eigen/doc/examples/DenseBase_middleRows_int.cpp

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+#include <Eigen/Core>
+#include <iostream>
+
+int main() {
+  int const N = 5;
+  Eigen::MatrixXi A(N, N);
+  A.setRandom();
+  std::cout << "A =\n" << A << '\n' << std::endl;
+  std::cout << "A(2..3,:) =\n" << A.middleRows(2, 2) << std::endl;
+  return 0;
+}