PCACut.h

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00001 /*
00002  * This program is free software; you can redistribute it and/or modify
00003  * it under the terms of the GNU General Public License as published by
00004  * the Free Software Foundation; either version 3 of the License, or
00005  * (at your option) any later version.
00006  *
00007  * Written (W) 1999-2008 Gunnar Raetsch
00008  * Written (W) 1999-2008 Soeren Sonnenburg
00009  * Copyright (C) 1999-2009 Fraunhofer Institute FIRST and Max-Planck-Society
00010  */
00011 
00012 #ifndef _CPCACUT__H__
00013 #define _CPCACUT__H__
00014 
00015 #include "lib/config.h"
00016 
00017 #ifdef HAVE_LAPACK
00018 
00019 #include <stdio.h>
00020 
00021 #include "preproc/SimplePreProc.h"
00022 #include "features/Features.h"
00023 #include "lib/common.h"
00024 
00025 namespace shogun
00026 {
00039 class CPCACut : public CSimplePreProc<float64_t>
00040 {
00041     public:
00047         CPCACut(int32_t do_whitening=0, float64_t thresh=1e-6);
00048         virtual ~CPCACut();
00049 
00051         virtual bool init(CFeatures* f);
00053         virtual void cleanup();
00054 
00058         virtual float64_t* apply_to_feature_matrix(CFeatures* f);
00059 
00062         virtual float64_t* apply_to_feature_vector(float64_t* f, int32_t &len);
00063 
00065         inline virtual const char* get_name() { return "PCACut"; }
00066 
00067     protected:
00069         double* T ;
00071         int32_t num_dim;
00073         int32_t num_old_dim;
00075         float64_t *mean ;
00076 
00078         bool initialized;
00079 
00081         int32_t do_whitening;
00083         float64_t thresh;
00084 };
00085 }
00086 #endif
00087 #endif
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