Function XGDMatrixSliceDMatrix

src/c_api/c_api.cc:595–599

}

XGB_DLL int XGDMatrixSliceDMatrix(DMatrixHandle handle, const int *idxset, xgboost::bst_ulong len,
                                  DMatrixHandle *out) {
  xgboost_CHECK_C_ARG_PTR(out);
  return XGDMatrixSliceDMatrixEx(handle, idxset, len, out, 0);
}

XGB_DLL int XGDMatrixSliceDMatrixEx(DMatrixHandle handle, const int *idxset, xgboost::bst_ulong len,
                                    DMatrixHandle *out, int allow_groups) {