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Medial Code Documentation
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preprocessed global index matrix, in CSR format. More...
#include <gradient_index.h>
Public Member Functions | |
| bst_bin_t | MaxNumBinPerFeat () const |
| GHistIndexMatrix (Context const *ctx, DMatrix *x, bst_bin_t max_bins_per_feat, double sparse_thresh, bool sorted_sketch, common::Span< float const > hess={}) | |
| Constrcutor for SimpleDMatrix. | |
| GHistIndexMatrix (MetaInfo const &info, common::HistogramCuts &&cuts, bst_bin_t max_bin_per_feat) | |
| Constructor for Iterative DMatrix. | |
| GHistIndexMatrix (Context const *ctx, MetaInfo const &info, EllpackPage const &page, BatchParam const &p) | |
| Constructor fro Iterative DMatrix where we might copy an existing ellpack page to host gradient index. | |
| GHistIndexMatrix (SparsePage const &page, common::Span< FeatureType const > ft, common::HistogramCuts cuts, int32_t max_bins_per_feat, bool is_dense, double sparse_thresh, int32_t n_threads) | |
| Constructor for external memory. | |
| template<typename Batch > | |
| void | PushAdapterBatch (Context const *ctx, size_t rbegin, size_t prev_sum, Batch const &batch, float missing, common::Span< FeatureType const > ft, double sparse_thresh, size_t n_samples_total) |
| template<typename Batch > | |
| void | PushAdapterBatchColumns (Context const *ctx, Batch const &batch, float missing, size_t rbegin) |
| void | ResizeIndex (const size_t n_index, const bool isDense) |
| void | GetFeatureCounts (size_t *counts) const |
| bool | IsDense () const |
| void | SetDense (bool is_dense) |
| std::size_t | RowIdx (size_t ridx) const |
| Get the local row index. | |
| bst_row_t | Size () const |
| bst_feature_t | Features () const |
| bool | ReadColumnPage (common::AlignedResourceReadStream *fi) |
| std::size_t | WriteColumnPage (common::AlignedFileWriteStream *fo) const |
| common::ColumnMatrix const & | Transpose () const |
| bst_bin_t | GetGindex (size_t ridx, size_t fidx) const |
| float | GetFvalue (size_t ridx, size_t fidx, bool is_cat) const |
| float | GetFvalue (std::vector< std::uint32_t > const &ptrs, std::vector< float > const &values, std::vector< float > const &mins, bst_row_t ridx, bst_feature_t fidx, bool is_cat) const |
| common::HistogramCuts & | Cuts () |
| common::HistogramCuts const & | Cuts () const |
Data Fields | |
| common::RefResourceView< std::size_t > | row_ptr |
| row pointer to rows by element position | |
| common::RefResourceView< std::uint8_t > | data |
| data storage for index. | |
| common::Index | index |
| The histogram index. | |
| common::RefResourceView< std::size_t > | hit_count |
| hit count of each index, used for constructing the ColumnMatrix | |
| common::HistogramCuts | cut |
| The corresponding cuts. | |
| bst_bin_t | max_numeric_bins_per_feat |
| max_bin for each feature. | |
| bst_row_t | base_rowid {0} |
| base row index for current page (used by external memory) | |
preprocessed global index matrix, in CSR format.
Transform floating values to integer index in histogram This is a global histogram index for CPU histogram. On GPU ellpack page is used.
| xgboost::GHistIndexMatrix::GHistIndexMatrix | ( | MetaInfo const & | info, |
| common::HistogramCuts && | cuts, | ||
| bst_bin_t | max_bin_per_feat | ||
| ) |
Constructor for Iterative DMatrix.
Initialize basic information and prepare for push batch.
1.9.8