first version that reproduce binary classification demo

Makefile

@@ -3,15 +3,15 @@ export CXX = clang++
 export CFLAGS = -Wall -O3 -msse2  -Wno-unknown-pragmas 
 
 # specify tensor path
-BIN = xgunity.exe
+BIN = xgboost
 OBJ = io.o
 .PHONY: clean all
 
 all: $(BIN) $(OBJ)
 export LDFLAGS= -pthread -lm 
 
-xgunity.exe: src/xgunity.cpp
+xgboost: src/xgboost_main.cpp io.o src/data.h src/tree/*.h src/tree/*.hpp src/gbm/*.h src/gbm/*.hpp src/utils/*.h src/learner/*.h src/learner/*.hpp 
-io.o: src/io/io.cpp
+io.o: src/io/io.cpp src/data.h src/utils/*.h
 
 $(BIN) : 
 	$(CXX) $(CFLAGS) $(LDFLAGS) -o $@ $(filter %.cpp %.o %.c, $^)
@@ -24,4 +24,3 @@ install:
 
 clean:
 	$(RM) $(OBJ) $(BIN) *~ */*~ */*/*~
-

src/data.h

@@ -310,12 +310,11 @@ class FMatrixS : public FMatrixInterface<FMatrixS>{
       const size_t nbatch = std::min(batch.size, max_nrow - batch.base_rowid);
       for (size_t i = 0; i < nbatch; ++i, ++num_buffered_row_) {
         SparseBatch::Inst inst = batch[i];
-        for (bst_uint j = 0; j < batch.size; ++j) {
+        for (bst_uint j = 0; j < inst.length; ++j) {
           builder.AddBudget(inst[j].findex);
         }
       }
     }
-
     builder.InitStorage();
 
     iter_->BeforeFirst();
@@ -325,9 +324,9 @@ class FMatrixS : public FMatrixInterface<FMatrixS>{
       const size_t nbatch = std::min(batch.size, max_nrow - batch.base_rowid);
       for (size_t i = 0; i < nbatch; ++i) {
         SparseBatch::Inst inst = batch[i];
-        for (bst_uint j = 0; j < batch.size; ++j) {
+        for (bst_uint j = 0; j < inst.length; ++j) {
           builder.PushElem(inst[j].findex,
-                           Entry((bst_uint)(batch.base_rowid+j),
+                           Entry((bst_uint)(batch.base_rowid+i),
                                  inst[j].fvalue));
         }
       }

src/gbm/gbm.h

@@ -7,6 +7,7 @@
  */
 #include <vector>
 #include "../data.h"
+#include "../utils/fmap.h"
 
 namespace xgboost {
 /*! \brief namespace for gradient booster */
@@ -63,6 +64,13 @@ class IGradBooster {
                        int64_t buffer_offset,
                        const std::vector<unsigned> &root_index,
                        std::vector<float> *out_preds) = 0;
+  /*!
+   * \brief dump the model in text format
+   * \param fmap feature map that may help give interpretations of feature
+   * \param option extra option of the dumo model
+   * \return a vector of dump for boosters
+   */
+  virtual std::vector<std::string> DumpModel(const utils::FeatMap& fmap, int option) = 0;
   // destrcutor
   virtual ~IGradBooster(void){}
 };

src/gbm/gbtree-inl.hpp

@@ -141,6 +141,13 @@ class GBTree : public IGradBooster<FMatrix> {
       }
     }
   }
+  virtual std::vector<std::string> DumpModel(const utils::FeatMap& fmap, int option) {
+    std::vector<std::string> dump;
+    for (size_t i = 0; i < trees.size(); i++) {
+      dump.push_back(trees[i]->DumpModel(fmap, option&1));
+    }
+    return dump;
+  }
 
  protected:
   // clear the model

src/io/io.cpp

@@ -7,9 +7,9 @@
 
 namespace xgboost {
 namespace io {
-DataMatrix* LoadDataMatrix(const char *fname) {
+DataMatrix* LoadDataMatrix(const char *fname, bool silent, bool savebuffer) {
   DMatrixSimple *dmat = new DMatrixSimple();
-  dmat->CacheLoad(fname);
+  dmat->CacheLoad(fname, silent, savebuffer);
   return dmat;
 }
 }  // namespace io

src/io/io.h

@@ -17,9 +17,11 @@ typedef learner::DMatrix<FMatrixS> DataMatrix;
 /*!
  * \brief load DataMatrix from stream
  * \param fname file name to be loaded
+ * \param silent whether print message during loading
+ * \param savebuffer whether temporal buffer the file if the file is in text format
  * \return a loaded DMatrix
  */
-DataMatrix* LoadDataMatrix(const char *fname);
+DataMatrix* LoadDataMatrix(const char *fname, bool silent = false, bool savebuffer = true);
 /*!
  * \brief save DataMatrix into stream, 
  *  note: the saved dmatrix format may not be in exactly same as input

src/learner/evaluation-inl.hpp

@@ -9,6 +9,7 @@
 #include <utility>
 #include <string>
 #include <climits>
+#include <cmath>
 #include <algorithm>
 #include "./evaluation.h"
 #include "./helper_utils.h"

src/learner/learner-inl.hpp

@@ -120,8 +120,8 @@ class BoostLearner {
   }
   inline void SaveModel(utils::IStream &fo) const {
     fo.Write(&mparam, sizeof(ModelParam));
-    fo.Write(&name_obj_);
+    fo.Write(name_obj_);
-    fo.Write(&name_gbm_);
+    fo.Write(name_gbm_);
     gbm_->SaveModel(fo);
   }
   /*!
@@ -139,7 +139,7 @@ class BoostLearner {
    * \param p_train pointer to the data matrix
    */
   inline void UpdateOneIter(int iter, DMatrix<FMatrix> *p_train) {
-    this->PredictRaw(preds_, *p_train);
+    this->PredictRaw(*p_train, &preds_);
     obj_->GetGradient(preds_, p_train->info, iter, &gpair_);
     gbm_->DoBoost(gpair_, p_train->fmat, p_train->info.root_index);
   }
@@ -189,7 +189,11 @@ class BoostLearner {
     this->PredictRaw(data, out_preds);
     obj_->PredTransform(out_preds);
   }
-
+  /*! \brief dump model out */
+  inline std::vector<std::string> DumpModel(const utils::FeatMap& fmap, int option) {
+    return gbm_->DumpModel(fmap, option);
+  }
+  
  protected:
   /*! 
    * \brief initialize the objective function and GBM, 
@@ -212,9 +216,9 @@ class BoostLearner {
    * \param out_preds output vector that stores the prediction
    */
   inline void PredictRaw(const DMatrix<FMatrix> &data,
-                         std::vector<float> *out_preds) {
+                         std::vector<float> *out_preds) const {
     gbm_->Predict(data.fmat, this->FindBufferOffset(data),
-                  data.info, out_preds);
+                  data.info.root_index, out_preds);
   }
 
   /*! \brief training parameter for regression */
@@ -280,7 +284,7 @@ class BoostLearner {
   inline int64_t FindBufferOffset(const DMatrix<FMatrix> &mat) const {
     for (size_t i = 0; i < cache_.size(); ++i) {
       if (cache_[i].mat_ == &mat && mat.cache_learner_ptr_ == this) {
-        if (cache_[i].num_row_ == mat.num_row) {
+        if (cache_[i].num_row_ == mat.info.num_row) {
           return cache_[i].buffer_offset_;
         }
       }

src/learner/objective-inl.hpp

@@ -6,6 +6,7 @@
  * \author Tianqi Chen, Kailong Chen
  */
 #include <vector>
+#include <cmath>
 #include "./objective.h"
 
 namespace xgboost {

src/tree/updater_colmaker-inl.hpp

@@ -27,7 +27,6 @@ class ColMaker: public IUpdater<FMatrix> {
                       const FMatrix &fmat,
                       const std::vector<unsigned> &root_index,
                       const std::vector<RegTree*> &trees) {
-    
     for (size_t i = 0; i < trees.size(); ++i) {
       Builder builder(param);
       builder.Update(gpair, fmat, root_index, trees[i]);
@@ -132,7 +131,9 @@ class ColMaker: public IUpdater<FMatrix> {
         // initialize feature index
         unsigned ncol = static_cast<unsigned>(fmat.NumCol());
         for (unsigned i = 0; i < ncol; ++i) {
-          if (fmat.GetColSize(i) != 0) feat_index.push_back(i);
+          if (fmat.GetColSize(i) != 0) {
+            feat_index.push_back(i);
+          }
         }
         unsigned n = static_cast<unsigned>(param.colsample_bytree * feat_index.size());
         random::Shuffle(feat_index);

src/xgboost_main.cpp

@@ -0,0 +1,244 @@
+#define _CRT_SECURE_NO_WARNINGS
+#define _CRT_SECURE_NO_DEPRECATE
+
+#include <ctime>
+#include <string>
+#include <cstring>
+#include "io/io.h"
+#include "utils/utils.h"
+#include "utils/config.h"
+#include "learner/learner-inl.hpp"
+
+namespace xgboost {
+/*!
+ * \brief wrapping the training process 
+ */
+class BoostLearnTask{
+ public:
+  inline int Run(int argc, char *argv[]) {
+    if (argc < 2) {
+      printf("Usage: <config>\n");
+      return 0;
+    }
+    utils::ConfigIterator itr(argv[1]);
+    while (itr.Next()) {
+      this->SetParam(itr.name(), itr.val());
+    }
+    for (int i = 2; i < argc; ++i) {
+      char name[256], val[256];
+      if (sscanf(argv[i], "%[^=]=%s", name, val) == 2) {
+        this->SetParam(name, val);
+      }
+    }
+    this->InitData();
+    this->InitLearner();
+    if (task == "dump") {
+      this->TaskDump(); return 0;
+    }
+    if (task == "eval") {
+      this->TaskEval(); return 0;
+    }
+    if (task == "pred") {
+      this->TaskPred();
+    } else {
+      this->TaskTrain();
+    }
+    return 0;
+  }
+  inline void SetParam(const char *name, const char *val) {
+    if (!strcmp("silent", name)) silent = atoi(val);
+    if (!strcmp("use_buffer", name)) use_buffer = atoi(val);
+    if (!strcmp("seed", name)) random::Seed(atoi(val));
+    if (!strcmp("num_round", name)) num_round = atoi(val);
+    if (!strcmp("save_period", name)) save_period = atoi(val);
+    if (!strcmp("eval_train", name)) eval_train = atoi(val);
+    if (!strcmp("task", name)) task = val;
+    if (!strcmp("data", name)) train_path = val;
+    if (!strcmp("test:data", name)) test_path = val;
+    if (!strcmp("model_in", name)) model_in = val;
+    if (!strcmp("model_out", name)) model_out = val;
+    if (!strcmp("model_dir", name)) model_dir_path = val;
+    if (!strcmp("fmap", name)) name_fmap = val;
+    if (!strcmp("name_dump", name)) name_dump = val;
+    if (!strcmp("name_pred", name)) name_pred = val;
+    if (!strcmp("dump_stats", name)) dump_model_stats = atoi(val);
+    if (!strncmp("eval[", name, 5)) {
+      char evname[256];
+      utils::Assert(sscanf(name, "eval[%[^]]", evname) == 1, "must specify evaluation name for display");
+      eval_data_names.push_back(std::string(evname));
+      eval_data_paths.push_back(std::string(val));
+    }
+    learner.SetParam(name, val);
+  }
+ public:
+  BoostLearnTask(void) {
+    // default parameters
+    silent = 0;
+    use_buffer = 1;
+    num_round = 10;
+    save_period = 0;
+    eval_train = 0;
+    dump_model_stats = 0;
+    task = "train";
+    model_in = "NULL";
+    model_out = "NULL";
+    name_fmap = "NULL";
+    name_pred = "pred.txt";
+    name_dump = "dump.txt";
+    model_dir_path = "./";
+    data = NULL;
+  }
+  ~BoostLearnTask(void){
+    for (size_t i = 0; i < deval.size(); i++){
+      delete deval[i];
+    }
+    if (data != NULL) delete data;
+  }
+ private:
+  inline void InitData(void) {
+    if (name_fmap != "NULL") fmap.LoadText(name_fmap.c_str());
+    if (task == "dump") return;
+    if (task == "pred") {
+      data = io::LoadDataMatrix(test_path.c_str(), silent != 0, use_buffer != 0);
+    } else {
+      // training
+      data = io::LoadDataMatrix(train_path.c_str(), silent != 0, use_buffer != 0);
+      {// intialize column access
+        data->fmat.InitColAccess();
+      }
+      utils::Assert(eval_data_names.size() == eval_data_paths.size(), "BUG");
+      for (size_t i = 0; i < eval_data_names.size(); ++i) {
+        deval.push_back(io::LoadDataMatrix(eval_data_paths[i].c_str(), silent != 0, use_buffer != 0));
+        devalall.push_back(deval.back());
+      }
+            
+      std::vector<io::DataMatrix *> dcache(1, data);
+      for (size_t i = 0; i < deval.size(); ++ i) {
+        dcache.push_back(deval[i]);
+      }
+      // set cache data to be all training and evaluation data
+      learner.SetCacheData(dcache);
+      
+      // add training set to evaluation set if needed
+      if( eval_train != 0 ) {
+        devalall.push_back(data);
+        eval_data_names.push_back(std::string("train"));
+      }
+    }
+  }
+  inline void InitLearner(void) {
+    if (model_in != "NULL"){
+      utils::FileStream fi(utils::FopenCheck(model_in.c_str(), "rb"));
+      learner.LoadModel(fi);
+      fi.Close();
+    } else {
+      utils::Assert(task == "train", "model_in not specified");
+      learner.InitModel();
+    }
+  }
+  inline void TaskTrain(void) {
+    const time_t start = time(NULL);
+    unsigned long elapsed = 0;
+    for (int i = 0; i < num_round; ++i) {
+      elapsed = (unsigned long)(time(NULL) - start);
+      if (!silent) printf("boosting round %d, %lu sec elapsed\n", i, elapsed);
+      learner.UpdateOneIter(i,data); 
+      std::string res = learner.EvalOneIter(i, devalall, eval_data_names);
+      fprintf(stderr, "%s\n", res.c_str());
+      if (save_period != 0 && (i + 1) % save_period == 0) {
+        this->SaveModel(i);
+      }
+      elapsed = (unsigned long)(time(NULL) - start);
+    }
+    // always save final round
+    if ((save_period == 0 || num_round % save_period != 0) && model_out != "NONE") {
+      if (model_out == "NULL"){
+        this->SaveModel(num_round - 1);
+      } else {
+        this->SaveModel(model_out.c_str());
+      }
+    }
+    if (!silent){
+      printf("\nupdating end, %lu sec in all\n", elapsed);
+    }
+  }
+  inline void TaskEval(void) {
+    learner.EvalOneIter(0, devalall, eval_data_names);
+  }
+  inline void TaskDump(void){
+    FILE *fo = utils::FopenCheck(name_dump.c_str(), "w");
+    std::vector<std::string> dump = learner.DumpModel(fmap, dump_model_stats != 0);
+    for (size_t i = 0; i < dump.size(); ++ i) {
+      fprintf(fo,"booster[%lu]:\n", i);
+      fprintf(fo,"%s", dump[i].c_str()); 
+    }
+    fclose(fo);
+  }
+  inline void SaveModel(const char *fname) const {
+    utils::FileStream fo(utils::FopenCheck(fname, "wb"));
+    learner.SaveModel(fo);
+    fo.Close();
+  }
+  inline void SaveModel(int i) const {
+    char fname[256];
+    sprintf(fname, "%s/%04d.model", model_dir_path.c_str(), i + 1);
+    this->SaveModel(fname);
+  }
+  inline void TaskPred(void) {
+    std::vector<float> preds;
+    if (!silent) printf("start prediction...\n");
+    learner.Predict(*data, &preds);
+    if (!silent) printf("writing prediction to %s\n", name_pred.c_str());
+    FILE *fo = utils::FopenCheck(name_pred.c_str(), "w");
+    for (size_t i = 0; i < preds.size(); i++) {
+      fprintf(fo, "%f\n", preds[i]);
+    }
+    fclose(fo);
+  }
+ private:
+  /* \brief whether silent */
+  int silent;
+  /* \brief whether use auto binary buffer */
+  int use_buffer;
+  /* \brief whether evaluate training statistics */            
+  int eval_train;
+  /* \brief number of boosting iterations */
+  int num_round;
+  /* \brief the period to save the model, 0 means only save the final round model */
+  int save_period;
+  /* \brief the path of training/test data set */
+  std::string train_path, test_path;
+  /* \brief the path of test model file, or file to restart training */
+  std::string model_in;
+  /* \brief the path of final model file, to be saved */
+  std::string model_out;
+  /* \brief the path of directory containing the saved models */
+  std::string model_dir_path;
+  /* \brief task to perform */
+  std::string task;
+  /* \brief name of predict file */
+  std::string name_pred;
+  /* \brief whether dump statistics along with model */
+  int dump_model_stats;
+  /* \brief name of feature map */
+  std::string name_fmap;
+  /* \brief name of dump file */
+  std::string name_dump;
+  /* \brief the paths of validation data sets */
+  std::vector<std::string> eval_data_paths;
+  /* \brief the names of the evaluation data used in output log */
+  std::vector<std::string> eval_data_names;
+ private:
+  io::DataMatrix* data;
+  std::vector<io::DataMatrix*> deval;
+  std::vector<const io::DataMatrix*> devalall;
+  utils::FeatMap fmap;
+  learner::BoostLearner<FMatrixS> learner;
+};
+}
+
+int main(int argc, char *argv[]){
+  xgboost::random::Seed(0);
+  xgboost::BoostLearnTask tsk;
+  return tsk.Run(argc, argv);
+}