MAAnalyzer.cpp

/*
 *  This file is part of the AiBO+ project
 *
 *  Copyright (C) 2005-2016 Csaba Kertész (csaba.kertesz@gmail.com)
 *
 *  AiBO+ is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  AiBO+ 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 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., 59 Temple Street #330, Boston, MA 02111-1307, USA.
 *
 */

#include "MAAnalyzer.hpp"

#include <MCContainers.hpp>

MAAnalyzer::MAAnalyzer() : FeatureNamesReady(false)
{
}


const MC::StringList& MAAnalyzer::GetFeatureNames() const
{
  return FeatureNames;
}


MC::FloatTable MAAnalyzer::CompactFeatureVectors(const MC::FloatTable& feature_vectors,
                                                 const unsigned int window_size)
{
  if (feature_vectors.empty() || window_size < 3)
    return MC::FloatTable();

  MC::FloatTable CompactTable;

  for (int i = 0; i < (int)feature_vectors.size(); i += (int)window_size / 3)
  {
    // Skip the last window if it is too small
    if (feature_vectors.size()-i < window_size)
      break;

    const int FrameSize = (i <= (int)feature_vectors.size()-(int)window_size ? (int)window_size :
                           (int)feature_vectors.size()-i);
    MC::FloatTable TempTable(feature_vectors.begin()+i, feature_vectors.begin()+i+FrameSize);

    // Mean and standard deviation can't be calculated for a one-row table
    if (TempTable.size() == 1)
      break;
    MC::FloatTable Results = MCCalculateMeanStDevForTableColumns(TempTable);

    MCMergeContainers(Results[0], Results[1]);
    CompactTable.push_back(Results[0]);
  }
  return CompactTable;
}