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00011 #include <shogun/features/MatrixFeatures.h>
00012
00013 namespace shogun {
00014
00015 template< class ST > CMatrixFeatures< ST >::CMatrixFeatures()
00016 : CFeatures(0)
00017 {
00018 init();
00019 }
00020
00021 template< class ST > CMatrixFeatures< ST >::CMatrixFeatures(
00022 int32_t num_vecs,
00023 int32_t num_feats)
00024 : CFeatures(0)
00025 {
00026 init();
00027 m_features = SGMatrixList< ST >(num_vecs);
00028 m_num_vectors = num_vecs;
00029 m_num_features = num_feats;
00030 }
00031
00032 template< class ST > CMatrixFeatures< ST >::CMatrixFeatures(
00033 SGMatrixList< ST > feats, int32_t num_feats)
00034 : CFeatures(0)
00035 {
00036 init();
00037 set_features(feats, num_feats);
00038 }
00039
00040 template< class ST > CMatrixFeatures< ST >::CMatrixFeatures(
00041 SGMatrix< ST > feats, int32_t feat_length, int32_t num_vecs)
00042 : CFeatures(0)
00043 {
00044 REQUIRE(feats.num_cols == feat_length*num_vecs, "The number of columns of feats "
00045 "must be equal to feat_length times num_vecs\n");
00046 init();
00047 SGMatrixList< ST > feats_list = SGMatrixList< ST >::split(feats, num_vecs);
00048 set_features(feats_list, feats.num_rows);
00049 }
00050
00051
00052 template< class ST > CFeatures* CMatrixFeatures< ST >::duplicate() const
00053 {
00054 return NULL;
00055 }
00056
00057 template< class ST > CMatrixFeatures< ST >::~CMatrixFeatures()
00058 {
00059 cleanup();
00060 }
00061
00062
00063 template< class ST > EFeatureType CMatrixFeatures< ST >::get_feature_type() const
00064 {
00065 return F_UNKNOWN;
00066 }
00067
00068
00069 template< class ST > EFeatureClass CMatrixFeatures< ST >::get_feature_class() const
00070 {
00071 return C_UNKNOWN;
00072 }
00073
00074
00075 template< class ST > int32_t CMatrixFeatures< ST >::get_size() const
00076 {
00077 return 0;
00078 }
00079
00080 template< class ST > SGMatrix< ST > CMatrixFeatures< ST >::get_feature_vector(
00081 int32_t num) const
00082 {
00083 if ( num < 0 || num >= get_num_vectors() )
00084 {
00085 SG_ERROR("The index of the feature vector to get must be between "
00086 "0 and %d (get_num_vectors()-1)\n", get_num_vectors()-1);
00087 }
00088
00089 return m_features[num];
00090 }
00091
00092 template< class ST > void CMatrixFeatures< ST >::get_feature_vector_col(
00093 SGVector< ST > out,
00094 int32_t num,
00095 int32_t col) const
00096 {
00097 if ( num < 0 || num >= get_num_vectors() )
00098 {
00099 SG_ERROR("The index of the feature vector to get must be between "
00100 "0 and %d (get_num_vectors()-1)\n", get_num_vectors()-1);
00101 }
00102
00103
00104 int32_t num_cols = m_features[num].num_cols;
00105 int32_t num_rows = m_features[num].num_rows;
00106
00107 if ( col < 0 || col >= num_cols )
00108 {
00109 SG_ERROR("The index of the column to get must be between "
00110 "0 and %d (#columns of the feature vector)\n", num_cols);
00111 }
00112
00113 if ( out.vlen < get_num_features() )
00114 {
00115 SG_ERROR("The vector out must have space to hold at least "
00116 "%d (get_num_features()) elements\n", get_num_features());
00117 }
00118
00119 int32_t start = col*num_rows;
00120 for ( int32_t i = 0 ; i < get_num_features(); ++i )
00121 {
00122 out[i] = m_features[num][start + i];
00123 }
00124 }
00125
00126 template< class ST > void CMatrixFeatures< ST >::set_feature_vector(
00127 SGMatrix< ST > const & vec,
00128 int32_t num)
00129 {
00130 if ( num < 0 || num >= get_num_vectors() )
00131 {
00132 SG_ERROR("The index of the feature vector to set must be between "
00133 "0 and %d (get_num_vectors()-1)\n", get_num_vectors()-1);
00134 }
00135
00136 if ( get_num_features() != 0 && vec.num_rows != get_num_features() )
00137 {
00138 SG_ERROR("The feature vector to set must have the same features "
00139 "as the rest of the MatrixFeatures, %d "
00140 "(get_num_features())\n", get_num_features());
00141 }
00142
00143 m_features[num] = vec;
00144 }
00145
00146 template< class ST > void CMatrixFeatures< ST >::set_features(
00147 SGMatrixList< ST > features, int32_t num_feats)
00148 {
00149 m_features = features;
00150 m_num_vectors = features.num_matrices;
00151 m_num_features = num_feats;
00152 }
00153
00154 template< class ST > void CMatrixFeatures< ST >::init()
00155 {
00156 SG_ADD(&m_num_vectors, "m_num_vectors", "Number of feature vectors",
00157 MS_NOT_AVAILABLE);
00158 SG_ADD(&m_num_features, "m_num_features",
00159 "Number of features per vector (optional)", MS_NOT_AVAILABLE);
00160
00161
00162
00163 m_num_vectors = 0;
00164 m_num_features = 0;
00165 }
00166
00167 template< class ST > void CMatrixFeatures< ST >::cleanup()
00168 {
00169 m_features = SGMatrixList< ST >();
00170 m_num_vectors = 0;
00171 m_num_features = 0;
00172 }
00173
00174 template class CMatrixFeatures<bool>;
00175 template class CMatrixFeatures<char>;
00176 template class CMatrixFeatures<int8_t>;
00177 template class CMatrixFeatures<uint8_t>;
00178 template class CMatrixFeatures<int16_t>;
00179 template class CMatrixFeatures<uint16_t>;
00180 template class CMatrixFeatures<int32_t>;
00181 template class CMatrixFeatures<uint32_t>;
00182 template class CMatrixFeatures<int64_t>;
00183 template class CMatrixFeatures<uint64_t>;
00184 template class CMatrixFeatures<float32_t>;
00185 template class CMatrixFeatures<float64_t>;
00186 template class CMatrixFeatures<floatmax_t>;
00187
00188 }