Re: [Boost-users] Multi Array Question

On 8/22/07, chris dion wrote:

Hi

I'm having a problem with the boost/multi_array and I'm hoping someone here can help, or at least explain why the following doesn't work.

What you are trying is not possible with the views (from your code it seems you misunderstood the way they work - take a second look at the docs herehttp://www.boost.org/libs/multi_array/doc/user.html#sec_views). You can solve your problem with a multi_array_ref and a different storage ordering. Here is an example: using namespace boost; typedef multi_array arr2; typedef multi_array_ref rarr2; typedef array shape2; // // create and fill array // shape2 sh = {3,4}; arr2 foo(sh); for (int i=0; i!=sh[0]; ++i) for (int j=0; j!=sh[1]; ++j) foo[i][j] = i + j*10; // // create a reference to transposed shape // shape2 shT = {4,3}; rarr2 fooT(foo.data(), shT, fortran_storage_order()); for (int i=0; i!=sh[0]; ++i) for (int j=0; j!=sh[1]; ++j) assert( foo[i][j] == fooT[j][i] ); hth Levent -- Server Levent Yilmaz Mechanical Engineering University of Pittsburgh