KernelLocallyLinearEmbedding.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) 2011 Sergey Lisitsyn
00008  * Copyright (C) 2011 Berlin Institute of Technology and Max-Planck-Society
00009  */
00010 
00011 #ifndef KERNELLOCALLYLINEAREMBEDDING_H_
00012 #define KERNELLOCALLYLINEAREMBEDDING_H_
00013 #include <shogun/lib/config.h>
00014 #ifdef HAVE_LAPACK
00015 #include <shogun/preprocessor/LocallyLinearEmbedding.h>
00016 #include <shogun/features/Features.h>
00017 #include <shogun/distance/Distance.h>
00018 #include <shogun/kernel/Kernel.h>
00019 
00020 namespace shogun
00021 {
00022 
00023 class CFeatures;
00024 
00025 class CKernel;
00026 
00035 class CKernelLocallyLinearEmbedding: public CLocallyLinearEmbedding
00036 {
00037 public:
00038 
00040     CKernelLocallyLinearEmbedding();
00041 
00045     CKernelLocallyLinearEmbedding(CKernel* kernel);
00046 
00048     virtual ~CKernelLocallyLinearEmbedding();
00049 
00053     virtual bool init(CFeatures* features);
00054 
00057     virtual void cleanup();
00058 
00062     virtual SGMatrix<float64_t> apply_to_feature_matrix(CFeatures* features);
00063 
00067     virtual SGVector<float64_t> apply_to_feature_vector(SGVector<float64_t> vector);
00068 
00072     void inline set_kernel(CKernel* kernel)
00073     {
00074         SG_UNREF(m_kernel);
00075         SG_REF(kernel);
00076         m_kernel = kernel;
00077     };
00078 
00082     CKernel* get_kernel() const
00083     {
00084         SG_REF(m_kernel);
00085         return m_kernel;
00086     };
00087 
00089     virtual inline const char* get_name() const { return "KernelLocallyLinearEmbedding"; };
00090 
00092     virtual inline EPreprocessorType get_type() const { return P_KERNELLOCALLYLINEAREMBEDDING; };
00093 
00094 protected:
00095 
00097     void init();
00098 
00102     static void* run_neighborhood_thread(void* p);
00103 
00107     static void* run_linearreconstruction_thread(void* p);
00108 
00114     SGMatrix<int32_t> get_neighborhood_matrix(SGMatrix<float64_t> kernel_matrix);
00115 
00116 protected:
00117 
00119     CKernel* m_kernel;
00120 
00121 };
00122 }
00123 
00124 #endif /* HAVE_LAPACK */
00125 #endif /* KERNELLOCALLYLINEAREMBEDDING_H_ */
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