exercise_2/colmap-build/eigen-eigen-323c052e1731/doc/snippets/Map_inner_stride.cpp

int array[12];
for(int i = 0; i < 12; ++i) array[i] = i;
cout << Map<VectorXi, 0, InnerStride<2> >
         (array, 6) // the inner stride has already been passed as template parameter
     << endl;