linearanalyticconditionalgaussian.h

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// $Id$
// Copyright (C) 2003 Klaas Gadeyne <first dot last at gmail dot com>
//                    Wim Meeussen  <wim dot meeussen at mech dot kuleuven dot be>
//                    Tinne De Laet  <tinne dot delaet at mech dot kuleuven dot be>
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//

#ifndef __LINEAR_SYSTEM_CONDITIONAL_GAUSSIAN__
#define __LINEAR_SYSTEM_CONDITIONAL_GAUSSIAN__

#include "analyticconditionalgaussian_additivenoise.h"

namespace BFL
{

  class LinearAnalyticConditionalGaussian : public AnalyticConditionalGaussianAdditiveNoise
    {
    public:

      LinearAnalyticConditionalGaussian(const vector<MatrixWrapper::Matrix> & ratio,
                                const Gaussian& additiveNoise);


      LinearAnalyticConditionalGaussian(const MatrixWrapper::Matrix& a, const Gaussian& additiveNoise);

      // Default copy constructor will do

      virtual ~LinearAnalyticConditionalGaussian();

      virtual LinearAnalyticConditionalGaussian* Clone() const;

      // implement virtual functions
      virtual MatrixWrapper::ColumnVector    ExpectedValueGet() const;
      virtual MatrixWrapper::Matrix          dfGet(unsigned int i)       const;


      virtual void NumConditionalArgumentsSet(unsigned int numconditionalarguments);


      void MatrixSet(unsigned int i, const MatrixWrapper::Matrix& m);


      const MatrixWrapper::Matrix& MatrixGet(unsigned int i) const;

    private:

      vector<MatrixWrapper::Matrix> _ratio;
      // variables to avoid allocation during expectedValueGet call
      mutable MatrixWrapper::ColumnVector _mean_temp;
      mutable MatrixWrapper::ColumnVector _arg;

    };

} // End namespace BFL

#endif //  __LINEAR_SYSTEM_CONDITIONAL_GAUSSIAN__