Function TestLogisticRegressionBasic

tests/cpp/objective/test_regression_obj.cc:103–129

}

void TestLogisticRegressionBasic(const Context* ctx) {
  std::string obj_name = "reg:logistic";
  std::vector<std::pair<std::string, std::string>> args;
  std::unique_ptr<ObjFunction> obj{ObjFunction::Create(obj_name, ctx)};

  obj->Configure(args);
  CheckConfigReload(obj, obj_name);

  // test label validation
  EXPECT_ANY_THROW(CheckObjFunction(obj, {0}, {10}, {1}, {0}, {0}))
      << "Expected error when label not in range [0,1f] for LogisticRegression";

  // test ProbToMargin
  CheckProbaToMargin(obj, 0.1f, -2.197f);
  CheckProbaToMargin(obj, 0.5f, 0);
  CheckProbaToMargin(obj, 0.9f, 2.197f);
  ASSERT_THAT([&] { CheckProbaToMargin(obj, 10, 0); }, GMockThrow("base_score must be in (0,1)"));

  // test PredTransform
  HostDeviceVector<bst_float> io_preds = {0, 0.1f, 0.5f, 0.9f, 1};
  std::vector<bst_float> out_preds = {0.5f, 0.524f, 0.622f, 0.710f, 0.731f};
  obj->PredTransform(&io_preds);
  auto& preds = io_preds.HostVector();
  for (int i = 0; i < static_cast<int>(io_preds.Size()); ++i) {
    EXPECT_NEAR(preds[i], out_preds[i], 0.01f);
  }
}

void TestsLogisticRawGPair(const Context* ctx) {
  std::string obj_name = "binary:logitraw";