Can anyone help shed light on the following? Suppose I have a 1d-array of size 10 (index base is 0). If I create a view on [0,10), strided by 3, shouldn't the size of the result be 4, corresponding to indices 0, 3, 6 and 9? Instead I get 3. Please forgive me if I'm off the mark here, as I'm new to boost in general and MultiArray in particular. The relevant line (assuming len => size) in boost/multi_array/base.hpp seems to be index len = (finish - start) / index_factor; (boost::detail::multi_array::multi_array_impl_base<>::generate_array_view() line 427). I would have written index len = 1 + (finish - 1 - start) / index_factor; The following code sample should make all clear. Any clarification greatly appreciated. Cheers, Ben typedef boost::multi_array<double, 1> array_type; typedef array_type::index index; typedef array_type::index_range range; index i; int values = 0; // Setup our base array and data. // A is a 1-d array with size 10, indices 0,1,...,9 and values 0,1,...,9. array_type A(boost::extents[10]); for(i = 0; i != 10; ++i) A[i] = values++; for(i = 0; i != 10; ++i) assert(A[i]==i); assert(A.size()==10); // The following views of A should all be effectively the same, // corresponding to indices 0,3,6,9 of A, so having // size 4, indices 0,1,2,3 and values 0,3,6,9? array_type::array_view<1>::type view1 = A[boost::indices[range(0,12,3)] ]; array_type::array_view<1>::type view2 = A[boost::indices[range(0,11,3)] ]; array_type::array_view<1>::type view3 = A[boost::indices[range(0,10,3)] ]; for(i = 0; i != 4; ++i) { assert(A[i*3]==view1[i]); assert(A[i*3]==view2[i]); assert(A[i*3]==view3[i]); } assert(view1.size()==4); assert(view2.size()==4); // Assert fails!? assert(view3.size()==4); // Assert fails!?