Function MakeSimpleDMatrixForTest

tests/cpp/c_api/test_c_api.cc:409–424

}

auto MakeSimpleDMatrixForTest(bst_idx_t n_samples, bst_feature_t n_features, Json dconfig) {
  HostDeviceVector<float> storage;
  auto arr_int = RandomDataGenerator{n_samples, n_features, 0.5f}.GenerateArrayInterface(&storage);

  data::ArrayAdapter adapter{StringView{arr_int}};
  std::shared_ptr<DMatrix> Xy{
      DMatrix::Create(&adapter, std::numeric_limits<float>::quiet_NaN(), Context{}.Threads())};

  DMatrixHandle p_fmat;
  std::string s_dconfig;
  Json::Dump(dconfig, &s_dconfig);
  CHECK_EQ(XGDMatrixCreateFromDense(arr_int.c_str(), s_dconfig.c_str(), &p_fmat), 0);

  MakeLabelForTest(Xy, p_fmat);
  return std::pair{p_fmat, Xy};
}

auto MakeQDMForTest(Context const *ctx, bst_idx_t n_samples, bst_feature_t n_features,
                    Json dconfig) {