| 18 | const char* kModelVersion = "v3"; |
| 19 | |
| 20 | std::string GBDT::DumpModel(int start_iteration, int num_iteration) const { |
| 21 | std::stringstream str_buf; |
| 22 | |
| 23 | str_buf << "{"; |
| 24 | str_buf << "\"name\":\"" << SubModelName() << "\"," << '\n'; |
| 25 | str_buf << "\"version\":\"" << kModelVersion << "\"," << '\n'; |
| 26 | str_buf << "\"num_class\":" << num_class_ << "," << '\n'; |
| 27 | str_buf << "\"num_tree_per_iteration\":" << num_tree_per_iteration_ << "," << '\n'; |
| 28 | str_buf << "\"label_index\":" << label_idx_ << "," << '\n'; |
| 29 | str_buf << "\"max_feature_idx\":" << max_feature_idx_ << "," << '\n'; |
| 30 | str_buf << "\"average_output\":" << (average_output_ ? "true" : "false") << ",\n"; |
| 31 | if (objective_function_ != nullptr) { |
| 32 | str_buf << "\"objective\":\"" << objective_function_->ToString() << "\",\n"; |
| 33 | } |
| 34 | |
| 35 | str_buf << "\"feature_names\":[\"" << Common::Join(feature_names_, "\",\"") |
| 36 | << "\"]," << '\n'; |
| 37 | |
| 38 | str_buf << "\"monotone_constraints\":[" |
| 39 | << Common::Join(monotone_constraints_, ",") << "]," << '\n'; |
| 40 | |
| 41 | str_buf << "\"tree_info\":["; |
| 42 | int num_used_model = static_cast<int>(models_.size()); |
| 43 | int total_iteration = num_used_model / num_tree_per_iteration_; |
| 44 | start_iteration = std::max(start_iteration, 0); |
| 45 | start_iteration = std::min(start_iteration, total_iteration); |
| 46 | if (num_iteration > 0) { |
| 47 | int end_iteration = start_iteration + num_iteration; |
| 48 | num_used_model = std::min(end_iteration * num_tree_per_iteration_ , num_used_model); |
| 49 | } |
| 50 | int start_model = start_iteration * num_tree_per_iteration_; |
| 51 | for (int i = start_model; i < num_used_model; ++i) { |
| 52 | if (i > start_model) { |
| 53 | str_buf << ","; |
| 54 | } |
| 55 | str_buf << "{"; |
| 56 | str_buf << "\"tree_index\":" << i << ","; |
| 57 | str_buf << models_[i]->ToJSON(); |
| 58 | str_buf << "}"; |
| 59 | } |
| 60 | str_buf << "]" << '\n'; |
| 61 | |
| 62 | str_buf << "}" << '\n'; |
| 63 | |
| 64 | return str_buf.str(); |
| 65 | } |
| 66 | |
| 67 | std::string GBDT::ModelToIfElse(int num_iteration) const { |
| 68 | std::stringstream str_buf; |