2: static char help[] = "Tests MatGetRowMax(), MatGetRowMin(), MatGetRowMaxAbs()\n";

  4: #include <petscmat.h>

  6: #define M 5
  7: #define N 6

 11: int main(int argc,char **args)
 12: {
 13:   Mat            A;
 14:   Vec            min,max,maxabs;
 15:   PetscInt       m,n;
 16:   PetscInt       imin[M],imax[M],imaxabs[M],indices[N],row;
 17:   PetscScalar    values[N];
 19:   MatType        type;
 20:   PetscMPIInt    size;
 21:   PetscBool      doTest=PETSC_TRUE;

 23:   PetscInitialize(&argc,&args,(char*)0,help);
 24:   MPI_Comm_size(PETSC_COMM_WORLD,&size);

 26:   MatCreate(PETSC_COMM_WORLD,&A);
 27:   MatSetSizes(A,PETSC_DECIDE,PETSC_DECIDE,M,N);
 28:   MatSetFromOptions(A);
 29:   MatSetUp(A);
 30:   row  = 0;

 32:   indices[0] = 0;   indices[1] = 1;  indices[2] = 2;  indices[3] = 3;  indices[4] = 4;  indices[5] = 5;
 33:   values[0]  = -1.0; values[1] = 0.0; values[2] = 1.0; values[3] = 3.0; values[4] = 4.0; values[5] = -5.0;

 35:   MatSetValues(A,1,&row,6,indices,values,INSERT_VALUES);
 36:   row  = 1;
 37:   MatSetValues(A,1,&row,3,indices,values,INSERT_VALUES);
 38:   row  = 4;
 39:   MatSetValues(A,1,&row,1,indices+4,values+4,INSERT_VALUES);
 40:   row  = 4;
 41:   MatSetValues(A,1,&row,2,indices+4,values+4,INSERT_VALUES);
 42:   MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY);
 43:   MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY);
 44:   MatView(A,PETSC_VIEWER_STDOUT_WORLD);

 46:   MatGetLocalSize(A, &m,&n);
 47:   VecCreate(PETSC_COMM_WORLD,&min);
 48:   VecSetSizes(min,m,PETSC_DECIDE);
 49:   VecSetFromOptions(min);
 50:   VecDuplicate(min,&max);
 51:   VecDuplicate(min,&maxabs);

 53:   /* Test MatGetRowMin, MatGetRowMax and MatGetRowMaxAbs */
 54:   if (size == 1) {
 55:     MatGetRowMin(A,min,imin);
 56:     MatGetRowMax(A,max,imax);
 57:     MatGetRowMaxAbs(A,maxabs,imaxabs);

 59:     PetscPrintf(PETSC_COMM_WORLD,"Row Minimums\n");
 60:     VecView(min,PETSC_VIEWER_STDOUT_WORLD);
 61:     PetscIntView(5,imin,PETSC_VIEWER_STDOUT_WORLD);
 62:     PetscPrintf(PETSC_COMM_WORLD,"Row Maximums\n");
 63:     VecView(max,PETSC_VIEWER_STDOUT_WORLD);
 64:     PetscIntView(5,imax,PETSC_VIEWER_STDOUT_WORLD);
 65:     PetscPrintf(PETSC_COMM_WORLD,"Row Maximum Absolute Values\n");
 66:     VecView(maxabs,PETSC_VIEWER_STDOUT_WORLD);
 67:     PetscIntView(5,imaxabs,PETSC_VIEWER_STDOUT_WORLD);

 69:   } else {
 70:     MatGetType(A,&type);
 71:     PetscPrintf(PETSC_COMM_WORLD,"\nMatrix type: %s\n",type);
 72:     /* AIJ */
 73:     PetscObjectTypeCompare((PetscObject)A,MATMPIAIJ,&doTest);
 74:     if (doTest) {
 75:       MatGetRowMaxAbs(A,maxabs,NULL);
 76:       MatGetRowMaxAbs(A,maxabs,imaxabs);
 77:       PetscPrintf(PETSC_COMM_WORLD,"Row Maximum Absolute Values:\n");
 78:       VecView(maxabs,PETSC_VIEWER_STDOUT_WORLD);
 79:     }
 80:     /* BAIJ */
 81:     PetscObjectTypeCompare((PetscObject)A,MATMPIBAIJ,&doTest);
 82:     if (doTest) {
 83:       MatGetRowMaxAbs(A,maxabs,NULL);
 84:       MatGetRowMaxAbs(A,maxabs,imaxabs);
 85:       PetscPrintf(PETSC_COMM_WORLD,"Row Maximum Absolute Values:\n");
 86:       VecView(maxabs,PETSC_VIEWER_STDOUT_WORLD);
 87:     }
 88:   }

 90:   if (size == 1) {
 91:     MatConvert(A,MATDENSE,MAT_REUSE_MATRIX,&A);

 93:     MatGetRowMin(A,min,imin);
 94:     MatGetRowMax(A,max,imax);
 95:     MatGetRowMaxAbs(A,maxabs,imaxabs);

 97:     MatView(A,PETSC_VIEWER_STDOUT_WORLD);
 98:     PetscPrintf(PETSC_COMM_WORLD,"Row Minimums\n");
 99:     VecView(min,PETSC_VIEWER_STDOUT_WORLD);
100:     PetscIntView(5,imin,PETSC_VIEWER_STDOUT_WORLD);
101:     PetscPrintf(PETSC_COMM_WORLD,"Row Maximums\n");
102:     VecView(max,PETSC_VIEWER_STDOUT_WORLD);
103:     PetscIntView(5,imax,PETSC_VIEWER_STDOUT_WORLD);
104:     PetscPrintf(PETSC_COMM_WORLD,"Row Maximum Absolute Values\n");
105:     VecView(maxabs,PETSC_VIEWER_STDOUT_WORLD);
106:     PetscIntView(5,imaxabs,PETSC_VIEWER_STDOUT_WORLD);
107:   }

109:   VecDestroy(&min);
110:   VecDestroy(&max);
111:   VecDestroy(&maxabs);
112:   MatDestroy(&A);
113:   PetscFinalize();
114:   return 0;
115: }