Actual source code: ex175.c


  2: static char help[] = "Tests MatCreateHermitianTranspose().\n\n";

  4: #include <petscmat.h>

  6: int main(int argc, char **args)
  7: {
  8:   Mat         C, C_htransposed, Cht, C_empty;
  9:   PetscInt    i, j, m = 10, n = 10;
 10:   PetscScalar v;

 12:   PetscFunctionBeginUser;
 13:   PetscCall(PetscInitialize(&argc, &args, (char *)0, help));
 14:   /* Create a complex non-hermitian matrix */
 15:   PetscCall(MatCreate(PETSC_COMM_SELF, &C));
 16:   PetscCall(MatSetSizes(C, PETSC_DECIDE, PETSC_DECIDE, m, n));
 17:   PetscCall(MatSetFromOptions(C));
 18:   PetscCall(MatSetUp(C));
 19:   for (i = 0; i < m; i++) {
 20:     for (j = 0; j < n; j++) {
 21:       v = 0.0 - 1.0 * PETSC_i;
 22:       if (i > j && i - j < 2) PetscCall(MatSetValues(C, 1, &i, 1, &j, &v, INSERT_VALUES));
 23:     }
 24:   }
 25:   PetscCall(MatAssemblyBegin(C, MAT_FINAL_ASSEMBLY));
 26:   PetscCall(MatAssemblyEnd(C, MAT_FINAL_ASSEMBLY));

 28:   PetscCall(MatCreateHermitianTranspose(C, &C_htransposed));

 30:   PetscCall(MatView(C, PETSC_VIEWER_STDOUT_SELF));
 31:   PetscCall(MatDuplicate(C_htransposed, MAT_COPY_VALUES, &Cht));
 32:   PetscCall(MatView(Cht, PETSC_VIEWER_STDOUT_SELF));
 33:   PetscCall(MatDuplicate(C_htransposed, MAT_DO_NOT_COPY_VALUES, &C_empty));
 34:   PetscCall(MatView(C_empty, PETSC_VIEWER_STDOUT_SELF));

 36:   PetscCall(MatDestroy(&C));
 37:   PetscCall(MatDestroy(&C_htransposed));
 38:   PetscCall(MatDestroy(&Cht));
 39:   PetscCall(MatDestroy(&C_empty));
 40:   PetscCall(PetscFinalize());
 41:   return 0;
 42: }

 44: /*TEST

 46:    build:
 47:      requires: complex

 49:    test:
 50:      output_file: output/ex175.out

 52: TEST*/