gsl_pca.hh

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/* -*- mia-c++  -*-
 *
 * This file is part of MIA - a toolbox for medical image analysis 
 * Copyright (c) Leipzig, Madrid 1999-2017 Gert Wollny
 *
 * MIA 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 3 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with MIA; if not, see <http://www.gnu.org/licenses/>.
 *
 */


#ifndef gslpp_pca_hh
#define gslpp_pca_hh

#include <mia/core/gsl_matrix.hh>
#include <mia/core/gsl_vector.hh>

namespace gsl {


class EXPORT_GSL PCA {
public: 
        typedef struct {
                Vector eval; 
                Matrix evec; 
        } Result;

        PCA(unsigned max_pc, double energy_thresh_ratio); 
        
        void set_eigenvalue_minimum(double min); 


        Result analyze(const Matrix& signal) const; 
        
private: 
        unsigned m_max_pc; 
        double m_energy_thresh_ratio; 
        double m_eval_min; 

};

}


#endif