00001 /* 00002 * This program is free software; you can redistribute it and/or modify 00003 * it under the terms of the GNU General Public License as published by 00004 * the Free Software Foundation; either version 3 of the License, or 00005 * (at your option) any later version. 00006 * 00007 * Written (W) 1999-2009 Soeren Sonnenburg 00008 * Copyright (C) 1999-2009 Fraunhofer Institute FIRST and Max-Planck-Society 00009 */ 00010 00011 #include "preproc/LogPlusOne.h" 00012 #include "preproc/SimplePreProc.h" 00013 #include "features/Features.h" 00014 #include "features/SimpleFeatures.h" 00015 #include "lib/Mathematics.h" 00016 00017 CLogPlusOne::CLogPlusOne() 00018 : CSimplePreProc<float64_t>("LogPlusOne", "LG+1") 00019 { 00020 } 00021 00022 00023 CLogPlusOne::~CLogPlusOne() 00024 { 00025 } 00026 00028 bool CLogPlusOne::init(CFeatures* f) 00029 { 00030 ASSERT(f->get_feature_class()==C_SIMPLE); 00031 ASSERT(f->get_feature_type()==F_DREAL); 00032 00033 return true; 00034 } 00035 00037 void CLogPlusOne::cleanup() 00038 { 00039 } 00040 00042 bool CLogPlusOne::load(FILE* f) 00043 { 00044 return false; 00045 } 00046 00048 bool CLogPlusOne::save(FILE* f) 00049 { 00050 return false; 00051 } 00052 00056 float64_t* CLogPlusOne::apply_to_feature_matrix(CFeatures* f) 00057 { 00058 int32_t i,j; 00059 int32_t num_vec; 00060 int32_t num_feat; 00061 float64_t* matrix=((CSimpleFeatures<float64_t>*) f)->get_feature_matrix(num_feat, num_vec); 00062 00063 for (i=0; i<num_vec; i++) 00064 { 00065 float64_t* vec=&matrix[i*num_feat]; 00066 00067 for (j=0; j<num_feat; j++) 00068 vec[j]=log(vec[j]+1); 00069 } 00070 return matrix; 00071 } 00072 00075 float64_t* CLogPlusOne::apply_to_feature_vector(float64_t* f, int32_t& len) 00076 { 00077 float64_t* vec=new float64_t[len]; 00078 int32_t i=0; 00079 00080 for (i=0; i<len; i++) 00081 vec[i]=log(f[i]+1); 00082 00083 return vec; 00084 } 00085 00087 bool CLogPlusOne::load_init_data(FILE* src) 00088 { 00089 return true; 00090 } 00091 00093 bool CLogPlusOne::save_init_data(FILE* dst) 00094 { 00095 return true; 00096 }