xgboost
feature_map.h
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1 
7 #ifndef XGBOOST_FEATURE_MAP_H_
8 #define XGBOOST_FEATURE_MAP_H_
9 
10 #include <xgboost/logging.h>
11 
12 #include <vector>
13 #include <string>
14 #include <cstring>
15 #include <iostream>
16 
17 namespace xgboost {
22 class FeatureMap {
23  public:
25  enum Type {
28  kInteger = 2,
29  kFloat = 3,
31  };
36  inline void LoadText(std::istream& is) { // NOLINT(*)
37  int fid;
38  std::string fname, ftype;
39  while (is >> fid >> fname >> ftype) {
40  this->PushBack(fid, fname.c_str(), ftype.c_str());
41  }
42  }
49  inline void PushBack(int fid, const char *fname, const char *ftype) {
50  CHECK_EQ(fid, static_cast<int>(names_.size()));
51  names_.emplace_back(fname);
52  types_.push_back(GetType(ftype));
53  }
55  inline void Clear() {
56  names_.clear();
57  types_.clear();
58  }
60  inline size_t Size() const {
61  return names_.size();
62  }
64  inline const char* Name(size_t idx) const {
65  CHECK_LT(idx, names_.size()) << "FeatureMap feature index exceed bound";
66  return names_[idx].c_str();
67  }
69  Type TypeOf(size_t idx) const {
70  CHECK_LT(idx, names_.size()) << "FeatureMap feature index exceed bound";
71  return types_[idx];
72  }
73 
74  private:
80  inline static Type GetType(const char* tname) {
81  using std::strcmp;
82  if (!strcmp("i", tname)) return kIndicator;
83  if (!strcmp("q", tname)) return kQuantitive;
84  if (!strcmp("int", tname)) return kInteger;
85  if (!strcmp("float", tname)) return kFloat;
86  if (!strcmp("c", tname)) return kCategorical;
87  LOG(FATAL) << "unknown feature type, use i for indicator and q for quantity";
88  return kIndicator;
89  }
91  std::vector<std::string> names_;
93  std::vector<Type> types_;
94 };
95 } // namespace xgboost
96 #endif // XGBOOST_FEATURE_MAP_H_
xgboost::FeatureMap::kQuantitive
@ kQuantitive
Definition: feature_map.h:27
xgboost::FeatureMap::kInteger
@ kInteger
Definition: feature_map.h:28
xgboost::FeatureMap::kIndicator
@ kIndicator
Definition: feature_map.h:26
xgboost::FeatureMap::Clear
void Clear()
clear the feature map
Definition: feature_map.h:55
xgboost::FeatureMap::Type
Type
type of feature maps
Definition: feature_map.h:25
xgboost::FeatureMap
Feature map data structure to help text model dump. TODO(tqchen) consider make it even more lightweig...
Definition: feature_map.h:22
xgboost::FeatureMap::kFloat
@ kFloat
Definition: feature_map.h:29
xgboost::FeatureMap::LoadText
void LoadText(std::istream &is)
load feature map from input stream
Definition: feature_map.h:36
xgboost::FeatureMap::TypeOf
Type TypeOf(size_t idx) const
Definition: feature_map.h:69
xgboost::FeatureMap::kCategorical
@ kCategorical
Definition: feature_map.h:30
xgboost::FeatureMap::Size
size_t Size() const
Definition: feature_map.h:60
xgboost::FeatureMap::Name
const char * Name(size_t idx) const
Definition: feature_map.h:64
xgboost::FeatureMap::PushBack
void PushBack(int fid, const char *fname, const char *ftype)
push back feature map.
Definition: feature_map.h:49
xgboost
namespace of xgboost
Definition: base.h:110