PLearn 0.1
RandomSamplesVMatrix.h
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00001 // -*- C++ -*-
00002 
00003 // RandomSamplesVMatrix.h
00004 //
00005 // Copyright (C) 2006 Olivier Delalleau
00006 //
00007 // Redistribution and use in source and binary forms, with or without
00008 // modification, are permitted provided that the following conditions are met:
00009 //
00010 //  1. Redistributions of source code must retain the above copyright
00011 //     notice, this list of conditions and the following disclaimer.
00012 //
00013 //  2. Redistributions in binary form must reproduce the above copyright
00014 //     notice, this list of conditions and the following disclaimer in the
00015 //     documentation and/or other materials provided with the distribution.
00016 //
00017 //  3. The name of the authors may not be used to endorse or promote
00018 //     products derived from this software without specific prior written
00019 //     permission.
00020 //
00021 // THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
00022 // IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
00023 // OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
00024 // NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
00025 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
00026 // TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
00027 // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
00028 // LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00029 // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
00030 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00031 //
00032 // This file is part of the PLearn library. For more information on the PLearn
00033 // library, go to the PLearn Web site at www.plearn.org
00034 
00035 // Authors: Olivier Delalleau
00036 
00040 #ifndef RandomSamplesVMatrix_INC
00041 #define RandomSamplesVMatrix_INC
00042 
00043 #include "SourceVMatrix.h"
00044 #include <plearn/math/PRandom.h>
00045 
00046 namespace PLearn {
00047 
00058 class RandomSamplesVMatrix : public SourceVMatrix
00059 {
00060     typedef SourceVMatrix inherited;
00061 
00062 public:
00063     //#####  Public Build Options  ############################################
00064 
00065     bool alternate_targets;
00066     string is_preserved;
00067     int n_non_preserved;
00068     int32_t seed;
00069 
00072 
00073 public:
00074     //#####  Public Member Functions  #########################################
00075 
00077     // ### Make sure the implementation in the .cc
00078     // ### initializes all fields to reasonable default values.
00079     RandomSamplesVMatrix();
00080 
00081 
00082     //#####  PLearn::Object Protocol  #########################################
00083 
00084     // Declares other standard object methods.
00085     // ### If your class is not instantiatable (it has pure virtual methods)
00086     // ### you should replace this by PLEARN_DECLARE_ABSTRACT_OBJECT_METHODS
00087     PLEARN_DECLARE_OBJECT(RandomSamplesVMatrix);
00088 
00089     // Simply calls inherited::build() then build_()
00090     virtual void build();
00091 
00093     // (PLEASE IMPLEMENT IN .cc)
00094     virtual void makeDeepCopyFromShallowCopy(CopiesMap& copies);
00095 
00096 protected:
00097 
00099     PP<PRandom> random_gen;
00100 
00102     TVec<int> non_preserved;
00103 
00107     TVec<int> indices;
00108 
00110     Vec last_targets;
00111 
00113     TVec< TVec<int> > target_list;
00114 
00118     TVec< Vec > target_distr;
00119 
00121     mutable map<real, int> target_to_idx;
00122 
00124     TVec< TVec<int> > by_target;
00125 
00126     //#####  Protected Options  ###############################################
00127 
00128 protected:
00129 
00130     //#####  Protected Member Functions  ######################################
00131 
00133     // (PLEASE IMPLEMENT IN .cc)
00134     static void declareOptions(OptionList& ol);
00135 
00139     virtual void getNewRow(int i, const Vec& v) const;
00140 
00141 private:
00142     //#####  Private Member Functions  ########################################
00143 
00145     // (PLEASE IMPLEMENT IN .cc)
00146     void build_();
00147 
00148 private:
00149     //#####  Private Data Members  ############################################
00150 
00151     // The rest of the private stuff goes here
00152 };
00153 
00154 // Declares a few other classes and functions related to this class
00155 DECLARE_OBJECT_PTR(RandomSamplesVMatrix);
00156 
00157 } // end of namespace PLearn
00158 
00159 #endif
00160 
00161 
00162 /*
00163   Local Variables:
00164   mode:c++
00165   c-basic-offset:4
00166   c-file-style:"stroustrup"
00167   c-file-offsets:((innamespace . 0)(inline-open . 0))
00168   indent-tabs-mode:nil
00169   fill-column:79
00170   End:
00171 */
00172 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :
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