PLearn 0.1
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00001 // -*- C++ -*- 00002 00003 // PLearn (A C++ Machine Learning Library) 00004 // Copyright (C) 1998 Pascal Vincent 00005 // Copyright (C) 1999-2002 Pascal Vincent, Yoshua Bengio, Rejean Ducharme and University of Montreal 00006 // Copyright (C) 2001-2002 Nicolas Chapados, Ichiro Takeuchi, Jean-Sebastien Senecal 00007 // Copyright (C) 2002 Xiangdong Wang, Christian Dorion 00008 00009 // Redistribution and use in source and binary forms, with or without 00010 // modification, are permitted provided that the following conditions are met: 00011 // 00012 // 1. Redistributions of source code must retain the above copyright 00013 // notice, this list of conditions and the following disclaimer. 00014 // 00015 // 2. Redistributions in binary form must reproduce the above copyright 00016 // notice, this list of conditions and the following disclaimer in the 00017 // documentation and/or other materials provided with the distribution. 00018 // 00019 // 3. The name of the authors may not be used to endorse or promote 00020 // products derived from this software without specific prior written 00021 // permission. 00022 // 00023 // THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR 00024 // IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 00025 // OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN 00026 // NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 00027 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED 00028 // TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 00029 // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 00030 // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 00031 // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 00032 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00033 // 00034 // This file is part of the PLearn library. For more information on the PLearn 00035 // library, go to the PLearn Web site at www.plearn.org 00036 00037 00038 #ifndef NllGeneralGaussianVariable_INC 00039 #define NllGeneralGaussianVariable_INC 00040 00041 #include <plearn/var/NaryVariable.h> 00042 00043 namespace PLearn { 00044 using namespace std; 00045 00046 class NllGeneralGaussianVariable: public NaryVariable 00047 { 00048 typedef NaryVariable inherited; 00049 00050 protected: 00052 int n; 00054 int ncomponents; 00056 int nneighbors; 00058 real tr_inv_Sigma; 00059 00061 Vec input, diff_neighbor_input, mu, sm_svd, sn, S; 00062 Vec uk, fk, uk2, inv_sigma_zj, zj, inv_sigma_fk; 00063 Vec temp_ncomp; 00064 Mat neighbors, F,F_copy, z, U, Ut, V, inv_Sigma_F, inv_Sigma_z; 00065 00066 public: 00068 real log_L; 00072 bool use_mu; 00075 int mu_nneighbors; 00076 00077 00079 NllGeneralGaussianVariable() {} 00080 NllGeneralGaussianVariable(const VarArray& the_varray, real thelogL, 00081 bool use_mu, int mu_nneighbors); 00082 00083 PLEARN_DECLARE_OBJECT(NllGeneralGaussianVariable); 00084 00085 virtual void build(); 00086 00087 virtual void recomputeSize(int& l, int& w) const; 00088 virtual void fprop(); 00089 virtual void bprop(); 00090 virtual void symbolicBprop(); 00091 virtual void makeDeepCopyFromShallowCopy(CopiesMap& copies); 00092 00093 protected: 00094 void build_(); 00095 00096 private: 00097 00098 void bprop_to_bases(const Mat& R, const Mat& M, const Vec& v1, 00099 const Vec& v2,real alpha); 00100 00101 }; 00102 00103 DECLARE_OBJECT_PTR(NllGeneralGaussianVariable); 00104 00105 inline Var nll_general_gaussian(Var tangent_plane_var, Var mu_var, Var sn_var, 00106 Var neighbors_var, 00107 real log_L, bool use_mu, int mu_nneighbors) 00108 { 00109 return new NllGeneralGaussianVariable(tangent_plane_var & mu_var & sn_var & neighbors_var,log_L, use_mu, mu_nneighbors); 00110 } 00111 00112 00113 } // end of namespace PLearn 00114 00115 #endif 00116 00117 00118 /* 00119 Local Variables: 00120 mode:c++ 00121 c-basic-offset:4 00122 c-file-style:"stroustrup" 00123 c-file-offsets:((innamespace . 0)(inline-open . 0)) 00124 indent-tabs-mode:nil 00125 fill-column:79 00126 End: 00127 */ 00128 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :