Hi list members, This is a more or less a general kind of " how to extend container classes" question - I'm trying to write a class which inherits from boost::multi_array - the to get a kind of matrix class with some additional service routines. Maybe it is a lack of experience - but I for the time being I don't know how to solve the problem to access the constructor of multi_array in my own class to initialize my matrix class - my current guess was to use the "this" pointer but it had not worked out like I supposed it to do. class NetworkMultiArray: public boost::multi_array<double,3> { public: NetworkMultiArray(int); virtual ~NetworkMultiArray(); }; Here is the constructor code: NetworkMultiArray::NetworkMultiArray(int length) { this::iterator iter3; typedef this::template subarray<2>::type::iterator iter2; typedef this::template subarray<1>::type::iterator iter1; for( iter1 i = *this.begin(); iter1 != *this.end(); iter1++){ for(iter2 ii = (*i).begin(); ii != (*i).end(); ii++){ for(iter3 iii = (*ii).begin(); iii != (*ii).end(); iii++){ *iii = 0.0 ; } } } } sure this does not work - and is the result from trying to adapt the iterator example from the documentation. my aim is to handle the NetworkMultiArray like a boost::multi_array and initialize it to zero - further it would be nice if somebody could tell me how I could assign a length to the array and the subarrays. The key-point is that I want to use my class (NetworkMultiArray) like a multi_array by inheritance of the multi_array features of boost:multi_array. Thank you very much in advance. Best regards Stefan -------------------------------------------------------- Stefan Klett (Dipl. Informatiker) | E-mail: stefan.klett@kit.edu Forschungszentrum Karlsruhe / KIT | Web: http://www.fzk.de SCC Steinbuch Centre for Computing| Phone: +49 (0)7247 828649 Hermann-von-Helmholtz-Platz 1 | Fax: +49 (0)7247 824972 D-76344 Eggenstein-Leopoldshafen | Mobile: +49 (0)176 20317250 -------------------------------------------------------------------