matrix_form.cc

// -*- mode: c++; fill-column: 80; c-basic-offset: 2; indent-tabs-mode: nil -*-
/*
    Copyright (c) 2010 Juan Jose Garcia Ripoll

    Tensor is free software; you can redistribute it and/or modify it
    under the terms of the GNU Library General Public License as published
    by the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Library General Public License for more details.

    You should have received a copy of the GNU General Public License along
    with this program; if not, write to the Free Software Foundation, Inc.,
    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#include <tensor/io.h>

namespace tensor {

  template<typename elt_t>
  std::ostream &
  MatrixForm<elt_t>::display(std::ostream &s) const
  {
    if (data.rank() > 2) {
      std::cerr << "MatrixForm can only be used with two-dimensional tensors.\n";
      abort();
    } else if (data.rank() == 2) {
      index rows = data.rows();
      index cols = data.columns();
      for (index i = 0; i < rows; i++) {
        if (i == 0)
          s << "[";
        else
          s << "\n ";
        for (index j = 0; j < cols; j++) {
          if (j) s << ", ";
          s << data(i,j);
        }
      }
      s << "]";
    } else if (data.rank() == 1) {
      for (index i = 0; i < data.size(); i++) {
        if (i)
          s << ", ";
        else
          s << "[";
        s << data[i];
      }
      s << "]";
    }
    return s;
  };

} // namespace tensor