PLearn 0.1
|
00001 // -*- C++ -*- 00002 00003 // ConstrainVariable.h 00004 // 00005 // Copyright (C) 2008 Pascal Vincent 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: Pascal Vincent 00036 00039 #ifndef ConstrainVariable_INC 00040 #define ConstrainVariable_INC 00041 00042 #include <plearn/var/UnaryVariable.h> 00043 00044 namespace PLearn { 00045 using namespace std; 00046 00047 00048 class ConstrainVariable: public UnaryVariable 00049 { 00050 typedef UnaryVariable inherited; 00051 00052 public: 00053 double max_rowsum; 00054 00056 ConstrainVariable(); 00057 00058 ConstrainVariable(Variable* input, bool call_build_ = true); 00059 00060 PLEARN_DECLARE_OBJECT(ConstrainVariable); 00061 00062 virtual void build(); 00063 00064 virtual void recomputeSize(int& l, int& w) const; 00065 virtual void fprop(); 00066 virtual void bprop(); 00068 virtual void bbprop(); 00069 virtual void symbolicBprop(); 00070 virtual void rfprop(); 00071 00072 inline real box_constrain(real x) const 00073 { return x<min_value ?min_value :(x>max_value ?max_value :x); } 00074 00075 private: 00076 00077 void build_(); 00078 00079 }; 00080 00081 DECLARE_OBJECT_PTR(ConstrainVariable); 00082 00083 inline Var diag(Var v) 00084 { return new ConstrainVariable(v); } 00085 00086 } // end of namespace PLearn 00087 00088 #endif 00089 00090 00091 /* 00092 Local Variables: 00093 mode:c++ 00094 c-basic-offset:4 00095 c-file-style:"stroustrup" 00096 c-file-offsets:((innamespace . 0)(inline-open . 0)) 00097 indent-tabs-mode:nil 00098 fill-column:79 00099 End: 00100 */ 00101 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :