ceph/src/boost/libs/numeric/ublas/doc/samples/banded_adaptor.cpp

   1 //
   2 //  Copyright (c) 2000-2002
   3 //  Joerg Walter, Mathias Koch
   4 //
   5 //  Distributed under the Boost Software License, Version 1.0. (See
   6 //  accompanying file LICENSE_1_0.txt or copy at
   7 //  http://www.boost.org/LICENSE_1_0.txt)
   8 //
   9 //  The authors gratefully acknowledge the support of
  10 //  GeNeSys mbH & Co. KG in producing this work.
  11 //
  12
  13 #include <boost/numeric/ublas/banded.hpp>
  14 #include <boost/numeric/ublas/io.hpp>
  15
  16 int main () {
  17     using namespace boost::numeric::ublas;
  18     matrix<double> m (3, 3);
  19     banded_adaptor<matrix<double> > ba (m, 1, 1);
  20     for (signed i = 0; i < signed (ba.size1 ()); ++ i)
  21         for (signed j = (std::max) (i - 1, 0); j < (std::min) (i + 2, signed (ba.size2 ())); ++ j)
  22             ba (i, j) = 3 * i + j;
  23     std::cout << ba << std::endl;
  24 }
  25