Single Tree XGBoost Model

single-tree-model.json

{
  "learner": {
    "attributes": {
      "scikit_learn": "{\"_estimator_type\": \"classifier\"}"
    },
    "feature_names": [],
    "feature_types": [],
    "gradient_booster": {
      "model": {
        "gbtree_model_param": {
          "num_parallel_tree": "1",
          "num_trees": "1"
        },
        "iteration_indptr": [
          0,
          1
        ],
        "tree_info": [
          0
        ],
        "trees": [
          {
            "base_weights": [
              -3.3802866E-8,
              1.8656437E0,
              -1.538925E0,
              1.9884424E-1,
              7.401848E-2,
              -1.7457907E-1,
              -1.9638585E-2
            ],
            "categories": [],
            "categories_nodes": [],
            "categories_segments": [],
            "categories_sizes": [],
            "default_left": [
              0,
              0,
              0,
              0,
              0,
              0,
              0
            ],
            "id": 0,
            "left_children": [
              1,
              3,
              5,
              -1,
              -1,
              -1,
              -1
            ],
            "loss_changes": [
              3.2697022E5,
              7.1129688E3,
              1.7331484E4,
              0E0,
              0E0,
              0E0,
              0E0
            ],
            "parents": [
              2147483647,
              0,
              0,
              1,
              1,
              2,
              2
            ],
            "right_children": [
              2,
              4,
              6,
              -1,
              -1,
              -1,
              -1
            ],
            "split_conditions": [
              -1.7919981E0,
              -1.4326483E0,
              1.6183813E0,
              1.9884424E-1,
              7.401848E-2,
              -1.7457907E-1,
              -1.9638585E-2
            ],
            "split_indices": [
              13,
              11,
              3,
              0,
              0,
              0,
              0
            ],
            "split_type": [
              0,
              0,
              0,
              0,
              0,
              0,
              0
            ],
            "sum_hessian": [
              1.1388182E5,
              5.1476492E4,
              6.2405332E4,
              4.6411746E4,
              5.0647466E3,
              5.4073152E4,
              8.332179E3
            ],
            "tree_param": {
              "num_deleted": "0",
              "num_feature": "28",
              "num_nodes": "7",
              "size_leaf_vector": "1"
            }
          }
        ]
      },
      "name": "gbtree"
    },
    "learner_model_param": {
      "base_score": "5.006873E-1",
      "boost_from_average": "1",
      "num_class": "0",
      "num_feature": "28",
      "num_target": "1"
    },
    "objective": {
      "name": "binary:logistic",
      "reg_loss_param": {
        "scale_pos_weight": "578.876038"
      }
    }
  },
  "version": [
    2,
    0,
    3
  ]
}