PLearn 0.1
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00001 // -*- C++ -*- 00002 00003 // TruncatedRealFunction.cc 00004 // 00005 // Copyright (C) 2006 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 00040 #include "TruncatedRealFunction.h" 00041 00042 namespace PLearn { 00043 using namespace std; 00044 00045 PLEARN_IMPLEMENT_OBJECT( 00046 TruncatedRealFunction, 00047 "An real function that truncates the selected feature between minval and maxval", 00048 "Also maps missing value to val_for_missing" 00049 ); 00050 00051 // ### Nothing to add here, simply calls build_ 00052 void TruncatedRealFunction::build() 00053 { 00054 inherited::build(); 00055 build_(); 00056 } 00057 00058 void TruncatedRealFunction::makeDeepCopyFromShallowCopy(CopiesMap& copies) 00059 { 00060 inherited::makeDeepCopyFromShallowCopy(copies); 00061 } 00062 00063 void TruncatedRealFunction::declareOptions(OptionList& ol) 00064 { 00065 // ### Declare all of this object's options here. 00066 // ### For the "flags" of each option, you should typically specify 00067 // ### one of OptionBase::buildoption, OptionBase::learntoption or 00068 // ### OptionBase::tuningoption. If you don't provide one of these three, 00069 // ### this option will be ignored when loading values from a script. 00070 // ### You can also combine flags, for example with OptionBase::nosave: 00071 // ### (OptionBase::buildoption | OptionBase::nosave) 00072 00073 declareOption(ol, "minval", &TruncatedRealFunction::minval, 00074 OptionBase::buildoption, 00075 "If x[which_feature]<=minval, minval is returned."); 00076 00077 declareOption(ol, "maxval", &TruncatedRealFunction::maxval, 00078 OptionBase::buildoption, 00079 "If x[which_feature]>=maxval, maxval is returned."); 00080 00081 declareOption(ol, "val_for_missing", &TruncatedRealFunction::maxval, 00082 OptionBase::buildoption, 00083 "Value to be returned if x[which_feature] is missing (NaN)."); 00084 00085 // Now call the parent class' declareOptions 00086 inherited::declareOptions(ol); 00087 } 00088 00089 real TruncatedRealFunction::evaluateFeature(real x) const 00090 { 00091 if(is_missing(x)) 00092 return val_for_missing; 00093 else if(x<=minval) 00094 return minval; 00095 else if(x>=maxval) 00096 return maxval; 00097 return x; 00098 } 00099 00100 void TruncatedRealFunction::build_() 00101 {} 00102 00103 00104 } // end of namespace PLearn 00105 00106 00107 /* 00108 Local Variables: 00109 mode:c++ 00110 c-basic-offset:4 00111 c-file-style:"stroustrup" 00112 c-file-offsets:((innamespace . 0)(inline-open . 0)) 00113 indent-tabs-mode:nil 00114 fill-column:79 00115 End: 00116 */ 00117 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=79 :