17   Mat            X;  in main()  local
33   PetscCall(MatCreate(PETSC_COMM_WORLD, &X));  in main()
34   PetscCall(MatSetSizes(X, PETSC_DECIDE, PETSC_DECIDE, 5, 2));  in main()
35   PetscCall(MatSetFromOptions(X));  in main()
36   PetscCall(MatSetUp(X));  in main()
40     PetscCall(MatSetValues(X, 5, rows_ix, 2, cols_ix, X_array, ADD_VALUES));  in main()
44   PetscCall(MatAssemblyBegin(X, MAT_FINAL_ASSEMBLY));  in main()
45   PetscCall(MatAssemblyEnd(X, MAT_FINAL_ASSEMBLY));  in main()
50   PetscCall(PetscRegressorFit(regressor, X, y));  in main()
51   PetscCall(PetscRegressorPredict(regressor, X, y_predicted));  in main()
61   PetscCall(MatDestroy(&X));  in main()