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Merge pull request #1262 from van51/feature/streaming_sparse
StreamingHashedSparseFeatures class
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src/shogun/features/streaming/StreamingHashedSparseFeatures.cpp
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| /* | ||
| * This program is free software; you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License as published by | ||
| * the Free Software Foundation; either version 3 of the License, or | ||
| * (at your option) any later version. | ||
| * | ||
| * Written (W) 2013 Evangelos Anagnostopoulos | ||
| * Copyright (C) 2013 Evangelos Anagnostopoulos | ||
| */ | ||
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| #include <shogun/features/streaming/StreamingHashedSparseFeatures.h> | ||
| #include <shogun/features/HashedSparseFeatures.h> | ||
| #include <shogun/io/streaming/StreamingFileFromSparseFeatures.h> | ||
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| namespace shogun | ||
| { | ||
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| template <class ST> | ||
| CStreamingHashedSparseFeatures<ST>::CStreamingHashedSparseFeatures() | ||
| { | ||
| init(NULL, false, 0, 0); | ||
| } | ||
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| template <class ST> | ||
| CStreamingHashedSparseFeatures<ST>::CStreamingHashedSparseFeatures(CStreamingFile* file, | ||
| bool is_labelled, int32_t size, int32_t d) | ||
| { | ||
| init(file, is_labelled, size, d); | ||
| } | ||
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| template <class ST> | ||
| CStreamingHashedSparseFeatures<ST>::CStreamingHashedSparseFeatures(CSparseFeatures<ST>* dot_features, | ||
| int32_t d, float64_t* lab) | ||
| { | ||
| ASSERT(dot_features); | ||
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| CStreamingFileFromSparseFeatures<ST>* file = | ||
| new CStreamingFileFromSparseFeatures<ST>(dot_features, lab); | ||
| bool is_labelled = (lab != NULL); | ||
| int32_t size = 1024; | ||
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| init(file, is_labelled, size, d); | ||
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| parser.set_free_vectors_on_destruct(false); | ||
| seekable=true; | ||
| } | ||
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| template <class ST> | ||
| CStreamingHashedSparseFeatures<ST>::~CStreamingHashedSparseFeatures() | ||
| { | ||
| } | ||
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| template <class ST> | ||
| void CStreamingHashedSparseFeatures<ST>::init(CStreamingFile* file, bool is_labelled, | ||
| int32_t size, int32_t d) | ||
| { | ||
| dim = d; | ||
| SG_ADD(&dim, "dim", "Size of target dimension", MS_NOT_AVAILABLE); | ||
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| has_labels = is_labelled; | ||
| if (file) | ||
| { | ||
| working_file = file; | ||
| SG_REF(working_file); | ||
| parser.init(file, is_labelled, size); | ||
| seekable = false; | ||
| } | ||
| else | ||
| file = NULL; | ||
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| set_read_functions(); | ||
| parser.set_free_vector_after_release(false); | ||
| } | ||
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| template <class ST> | ||
| float32_t CStreamingHashedSparseFeatures<ST>::dot(CStreamingDotFeatures* df) | ||
| { | ||
| ASSERT(df); | ||
| ASSERT(df->get_feature_type() == get_feature_type()) | ||
| ASSERT(strcmp(df->get_name(),get_name())==0) | ||
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| CStreamingHashedSparseFeatures<ST>* hdf = (CStreamingHashedSparseFeatures<ST>* ) df; | ||
| return current_vector.sparse_dot(hdf->current_vector); | ||
| } | ||
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| template <class ST> | ||
| float32_t CStreamingHashedSparseFeatures<ST>::dense_dot(const float32_t* vec2, int32_t vec2_len) | ||
| { | ||
| ASSERT(vec2_len == dim); | ||
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| float32_t result = 0; | ||
| for (index_t i=0; i<current_vector.num_feat_entries; i++) | ||
| result += vec2[current_vector.features[i].feat_index] * current_vector.features[i].entry; | ||
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| return result; | ||
| } | ||
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| template <class ST> | ||
| void CStreamingHashedSparseFeatures<ST>::add_to_dense_vec(float32_t alpha, float32_t* vec2, | ||
| int32_t vec2_len, bool abs_val) | ||
| { | ||
| ASSERT(vec2_len == dim); | ||
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| if (abs_val) | ||
| alpha = CMath::abs(alpha); | ||
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| for (index_t i=0; i<current_vector.num_feat_entries; i++) | ||
| vec2[current_vector.features[i].feat_index] += alpha * current_vector.features[i].entry; | ||
| } | ||
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| template <class ST> | ||
| int32_t CStreamingHashedSparseFeatures<ST>::get_dim_feature_space() const | ||
| { | ||
| return dim; | ||
| } | ||
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| template <class ST> | ||
| const char* CStreamingHashedSparseFeatures<ST>::get_name() const | ||
| { | ||
| return "StreamingHashedSparseFeatures"; | ||
| } | ||
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| template <class ST> | ||
| int32_t CStreamingHashedSparseFeatures<ST>::get_num_vectors() const | ||
| { | ||
| return 1; | ||
| } | ||
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| template <class ST> | ||
| CFeatures* CStreamingHashedSparseFeatures<ST>::duplicate() const | ||
| { | ||
| return new CStreamingHashedSparseFeatures<ST>(*this); | ||
| } | ||
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| template <class ST> | ||
| void CStreamingHashedSparseFeatures<ST>::set_vector_reader() | ||
| { | ||
| SG_DEBUG("called inside set_vector_reader\n"); | ||
| parser.set_read_vector(&CStreamingFile::get_sparse_vector); | ||
| } | ||
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| template <class ST> | ||
| void CStreamingHashedSparseFeatures<ST>::set_vector_and_label_reader() | ||
| { | ||
| parser.set_read_vector_and_label(&CStreamingFile::get_sparse_vector_and_label); | ||
| } | ||
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| template <class ST> | ||
| EFeatureType CStreamingHashedSparseFeatures<ST>::get_feature_type() const | ||
| { | ||
| return F_UINT; | ||
| } | ||
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| template <class ST> | ||
| EFeatureClass CStreamingHashedSparseFeatures<ST>::get_feature_class() const | ||
| { | ||
| return C_STREAMING_SPARSE; | ||
| } | ||
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| template <class ST> | ||
| void CStreamingHashedSparseFeatures<ST>::start_parser() | ||
| { | ||
| if (!parser.is_running()) | ||
| parser.start_parser(); | ||
| } | ||
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| template <class ST> | ||
| void CStreamingHashedSparseFeatures<ST>::end_parser() | ||
| { | ||
| parser.end_parser(); | ||
| } | ||
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| template <class ST> | ||
| float64_t CStreamingHashedSparseFeatures<ST>::get_label() | ||
| { | ||
| return current_label; | ||
| } | ||
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| template <class ST> | ||
| bool CStreamingHashedSparseFeatures<ST>::get_next_example() | ||
| { | ||
| SGSparseVector<ST> tmp; | ||
| if (parser.get_next_example(tmp.features, | ||
| tmp.num_feat_entries, current_label)) | ||
| { | ||
| current_vector = CHashedSparseFeatures<ST>::hash_vector(tmp, dim); | ||
| tmp.features = NULL; | ||
| tmp.num_feat_entries = -1; | ||
| return true; | ||
| } | ||
| return false; | ||
| } | ||
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| template <class ST> | ||
| void CStreamingHashedSparseFeatures<ST>::release_example() | ||
| { | ||
| parser.finalize_example(); | ||
| } | ||
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| template <class ST> | ||
| int32_t CStreamingHashedSparseFeatures<ST>::get_num_features() | ||
| { | ||
| return dim; | ||
| } | ||
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| template <class ST> | ||
| SGSparseVector<uint32_t> CStreamingHashedSparseFeatures<ST>::get_vector() | ||
| { | ||
| return current_vector; | ||
| } | ||
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| template class CStreamingHashedSparseFeatures<bool>; | ||
| template class CStreamingHashedSparseFeatures<char>; | ||
| template class CStreamingHashedSparseFeatures<int8_t>; | ||
| template class CStreamingHashedSparseFeatures<uint8_t>; | ||
| template class CStreamingHashedSparseFeatures<int16_t>; | ||
| template class CStreamingHashedSparseFeatures<uint16_t>; | ||
| template class CStreamingHashedSparseFeatures<int32_t>; | ||
| template class CStreamingHashedSparseFeatures<uint32_t>; | ||
| template class CStreamingHashedSparseFeatures<int64_t>; | ||
| template class CStreamingHashedSparseFeatures<uint64_t>; | ||
| template class CStreamingHashedSparseFeatures<float32_t>; | ||
| template class CStreamingHashedSparseFeatures<float64_t>; | ||
| template class CStreamingHashedSparseFeatures<floatmax_t>; | ||
| } |
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