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 /* ******************************************************* 00039 * $Id: ReIndexedTargetVariable.h 3994 2005-08-25 13:35:03Z chapados $ 00040 * This file is part of the PLearn library. 00041 ******************************************************* */ 00042 00043 #ifndef ReIndexedTargetVariable_INC 00044 #define ReIndexedTargetVariable_INC 00045 00046 #include "BinaryVariable.h" 00047 #include <plearn/vmat/VMat.h> 00048 00049 namespace PLearn { 00050 using namespace std; 00051 00052 /* 00053 Inspired from ReIndexedTargetVMatrix, this variable reindexes a 00054 variable (input1) according to the getValues(row,target_col,values) function of 00055 a given VMatrix. The user must specify the input part of the VMatrix 00056 (input2), and the columns numbers corresponding to input1's fields. 00057 In order to construct a row when calling getValues(row,target_col,values), 00058 input2 is used for the input part, and the rest of the row is filled 00059 with NaN. 00060 The user can, alternatively, directly give a Dictionary object 00061 that will give the possible values. Then, input2 is ignored. 00062 */ 00063 class ReIndexedTargetVariable: public BinaryVariable 00064 { 00065 typedef BinaryVariable inherited; 00066 00067 protected: 00068 Vec row; 00069 Vec values; 00070 TVec<string> options; 00071 00072 public: 00074 VMat source; 00076 TVec<int> target_cols; 00079 PP<Dictionary> dict; 00080 00081 public: 00083 ReIndexedTargetVariable(); 00084 ReIndexedTargetVariable(Variable* input1, Variable* input2, VMat the_source, TVec<int> the_target_cols); 00085 ReIndexedTargetVariable(Variable* input1, Variable* input2, PP<Dictionary> the_dict, TVec<int> the_target_cols); 00086 00087 PLEARN_DECLARE_OBJECT(ReIndexedTargetVariable); 00088 static void declareOptions(OptionList &ol); 00089 00090 virtual void build(); 00091 00092 virtual void recomputeSize(int& l, int& w) const; 00093 virtual void fprop(); 00094 virtual void bprop(); 00095 virtual void symbolicBprop(); 00096 virtual void rfprop(); 00097 virtual void makeDeepCopyFromShallowCopy(CopiesMap& copies); 00098 00099 protected: 00100 void build_(); 00101 }; 00102 00103 DECLARE_OBJECT_PTR(ReIndexedTargetVariable); 00104 00105 inline Var reindexed_target(Var target, Var input, VMat source, TVec<int> target_cols) 00106 { return new ReIndexedTargetVariable(target,input,source,target_cols); } 00107 00108 inline Var reindexed_target(Var target, Var input, PP<Dictionary> dict, TVec<int> target_cols) 00109 { return new ReIndexedTargetVariable(target,input,dict,target_cols); } 00110 00111 00112 } // end of namespace PLearn 00113 00114 #endif 00115 00116 00117 /* 00118 Local Variables: 00119 mode:c++ 00120 c-basic-offset:4 00121 c-file-style:"stroustrup" 00122 c-file-offsets:((innamespace . 0)(inline-open . 0)) 00123 indent-tabs-mode:nil 00124 fill-column:79 00125 End: 00126 */ 00127 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :