8 #ifndef XGBOOST_LEARNER_H_
9 #define XGBOOST_LEARNER_H_
28 class GradientBooster;
93 virtual void UpdateOneIter(
int iter, std::shared_ptr<DMatrix> train) = 0;
102 std::shared_ptr<DMatrix> train,
112 const std::vector<std::shared_ptr<DMatrix>>& data_sets,
113 const std::vector<std::string>& data_names) = 0;
127 virtual void Predict(std::shared_ptr<DMatrix> data,
130 unsigned layer_begin,
132 bool training =
false,
133 bool pred_leaf =
false,
134 bool pred_contribs =
false,
135 bool approx_contribs =
false,
136 bool pred_interactions =
false) = 0;
150 uint32_t layer_end) = 0;
157 std::vector<bst_feature_t>* features,
158 std::vector<float>* scores) = 0;
186 virtual void SetParam(
const std::string& key,
const std::string& value) = 0;
202 virtual void SetAttr(
const std::string& key,
const std::string& value) = 0;
210 virtual bool GetAttr(
const std::string& key, std::string* out)
const = 0;
216 virtual bool DelAttr(
const std::string& key) = 0;
253 virtual Learner *
Slice(int32_t begin_layer, int32_t end_layer, int32_t step,
254 bool *out_of_bound) = 0;
264 std::string format) = 0;
272 static Learner*
Create(
const std::vector<std::shared_ptr<DMatrix> >& cache_data);
285 std::unique_ptr<ObjFunction>
obj_;
287 std::unique_ptr<GradientBooster>
gbm_;
294 struct LearnerModelParamLegacy;
defines configuration macros of xgboost.
Feature map data structure to help text model dump. TODO(tqchen) consider make it even more lightweig...
Definition: feature_map.h:22
Definition: host_device_vector.h:86
Data structure representing JSON format.
Definition: json.h:356
Learner class that does training and prediction. This is the user facing module of xgboost training....
Definition: learner.h:79
virtual std::vector< std::string > GetAttrNames() const =0
Get a vector of attribute names from the booster.
virtual void SetParam(const std::string &key, const std::string &value)=0
Set parameter for booster.
virtual void LoadModel(dmlc::Stream *fi)=0
std::vector< std::unique_ptr< Metric > > metrics_
The evaluation metrics used to evaluate the model.
Definition: learner.h:289
virtual void CalcFeatureScore(std::string const &importance_type, common::Span< int32_t const > trees, std::vector< bst_feature_t > *features, std::vector< float > *scores)=0
Calculate feature score. See doc in C API for outputs.
virtual std::vector< std::string > DumpModel(const FeatureMap &fmap, bool with_stats, std::string format)=0
dump the model in the requested format
virtual std::string EvalOneIter(int iter, const std::vector< std::shared_ptr< DMatrix >> &data_sets, const std::vector< std::string > &data_names)=0
evaluate the model for specific iteration using the configured metrics.
~Learner() override
virtual destructor
virtual XGBAPIThreadLocalEntry & GetThreadLocal() const =0
virtual const std::map< std::string, std::string > & GetConfigurationArguments() const =0
Get configuration arguments currently stored by the learner.
virtual void SetFeatureNames(std::vector< std::string > const &fn)=0
Set the feature names for current booster.
virtual void SaveModel(dmlc::Stream *fo) const =0
virtual Context const * Ctx() const =0
Return the context object of this Booster.
virtual void BoostOneIter(int iter, std::shared_ptr< DMatrix > train, HostDeviceVector< GradientPair > *in_gpair)=0
Do customized gradient boosting with in_gpair. in_gair can be mutated after this call.
virtual void Configure()=0
Configure Learner based on set parameters.
virtual int32_t BoostedRounds() const =0
virtual bool DelAttr(const std::string &key)=0
Delete an attribute from the booster.
virtual bool GetAttr(const std::string &key, std::string *out) const =0
Get attribute from the booster. The property will be saved along the booster.
virtual void SetParams(Args const &args)=0
Set multiple parameters at once.
virtual void UpdateOneIter(int iter, std::shared_ptr< DMatrix > train)=0
update the model for one iteration With the specified objective function.
virtual void Predict(std::shared_ptr< DMatrix > data, bool output_margin, HostDeviceVector< bst_float > *out_preds, unsigned layer_begin, unsigned layer_end, bool training=false, bool pred_leaf=false, bool pred_contribs=false, bool approx_contribs=false, bool pred_interactions=false)=0
get prediction given the model.
virtual Learner * Slice(int32_t begin_layer, int32_t end_layer, int32_t step, bool *out_of_bound)=0
Slice the model.
virtual void SetAttr(const std::string &key, const std::string &value)=0
Set additional attribute to the Booster.
std::unique_ptr< ObjFunction > obj_
objective function
Definition: learner.h:285
virtual void InplacePredict(std::shared_ptr< DMatrix > p_m, PredictionType type, float missing, HostDeviceVector< bst_float > **out_preds, uint32_t layer_begin, uint32_t layer_end)=0
Inplace prediction.
std::unique_ptr< GradientBooster > gbm_
The gradient booster used by the model.
Definition: learner.h:287
virtual void GetFeatureNames(std::vector< std::string > *fn) const =0
Get the feature names for current booster.
void LoadModel(Json const &in) override=0
load the model from a JSON object
virtual void SetFeatureTypes(std::vector< std::string > const &ft)=0
Set the feature types for current booster.
void SaveModel(Json *out) const override=0
saves the model config to a JSON object
static Learner * Create(const std::vector< std::shared_ptr< DMatrix > > &cache_data)
Create a new instance of learner.
Context ctx_
Training parameter.
Definition: learner.h:291
virtual uint32_t Groups() const =0
virtual uint32_t GetNumFeature() const =0
Get the number of features of the booster.
virtual void GetFeatureTypes(std::vector< std::string > *ft) const =0
Get the feature types for current booster.
span class implementation, based on ISO++20 span<T>. The interface should be the same.
Definition: span.h:423
A tensor view with static type and dimension. It implements indexing and slicing.
Definition: linalg.h:262
Feature map data structure to help visualization and model dump.
A device-and-host vector abstraction layer.
Defines the abstract interface for different components in XGBoost.
Definition: intrusive_ptr.h:207
namespace of xgboost
Definition: base.h:110
std::vector< std::pair< std::string, std::string > > Args
Definition: base.h:318
uint32_t bst_feature_t
Type for data column (feature) index.
Definition: base.h:123
PredictionType
Definition: learner.h:33
Interface of predictor, performs predictions for a gradient booster.
Definition: generic_parameters.h:15
Definition: learner.h:299
uint32_t num_feature
Definition: learner.h:309
LearnerModelParam(Context const *ctx, LearnerModelParamLegacy const &user_param, linalg::Tensor< float, 1 > base_margin, ObjInfo t)
LearnerModelParam()=default
linalg::TensorView< float const, 1 > BaseScore(int32_t device) const
bool Initialized() const
Definition: learner.h:331
LearnerModelParam(LearnerModelParamLegacy const &user_param, ObjInfo t)
LearnerModelParam(bst_feature_t n_features, linalg::Tensor< float, 1 > base_margin, uint32_t n_groups)
Definition: learner.h:321
uint32_t num_output_group
Definition: learner.h:311
void Copy(LearnerModelParam const &that)
linalg::TensorView< float const, 1 > BaseScore(Context const *ctx) const
ObjInfo task
Definition: learner.h:313
A struct returned by objective, which determines task at hand. The struct is not used by any algorith...
Definition: task.h:24
@ kRegression
Definition: task.h:27
Contains pointer to input matrix and associated cached predictions.
Definition: predictor.h:35
entry to to easily hold returning information
Definition: learner.h:44
std::vector< bst_ulong > prediction_shape
Temp variable for returning prediction shape.
Definition: learner.h:60
std::vector< GradientPair > tmp_gpair
temp variable of gradient pairs.
Definition: learner.h:56
PredictionCacheEntry prediction_entry
Temp variable for returning prediction result.
Definition: learner.h:58
std::vector< const char * > ret_vec_charp
result holder for returning string pointers
Definition: learner.h:52
std::string ret_str
result holder for returning string
Definition: learner.h:46
std::vector< char > ret_char_vec
result holder for returning raw buffer
Definition: learner.h:48
std::vector< std::string > ret_vec_str
result holder for returning strings
Definition: learner.h:50
std::vector< bst_float > ret_vec_float
returning float vector.
Definition: learner.h:54