Actual source code: ex60.c
2: static char help[] = "Tests MatGetColumnVector().";
4: #include <petscmat.h>
6: int main(int argc,char **args)
7: {
8: Mat C;
9: PetscInt i,j,m = 3,n = 2,Ii,J,col = 0;
10: PetscMPIInt size,rank;
11: PetscScalar v;
12: Vec yy;
14: PetscInitialize(&argc,&args,(char*)0,help);
15: PetscOptionsGetInt(NULL,NULL,"-col",&col,NULL);
17: MPI_Comm_rank(PETSC_COMM_WORLD,&rank);
18: MPI_Comm_size(PETSC_COMM_WORLD,&size);
19: n = 2*size;
21: /* create the matrix for the five point stencil, YET AGAIN*/
22: MatCreate(PETSC_COMM_WORLD,&C);
23: MatSetSizes(C,PETSC_DECIDE,PETSC_DECIDE,m*n,m*n);
24: MatSetFromOptions(C);
25: MatSeqAIJSetPreallocation(C,5,NULL);
26: MatMPIAIJSetPreallocation(C,5,NULL,5,NULL);
27: MatSetUp(C);
29: for (i=0; i<m; i++) {
30: for (j=2*rank; j<2*rank+2; j++) {
31: v = -1.0; Ii = j + n*i;
32: if (i>0) {J = Ii - n; MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES);}
33: if (i<m-1) {J = Ii + n; MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES);}
34: if (j>0) {J = Ii - 1; MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES);}
35: if (j<n-1) {J = Ii + 1; MatSetValues(C,1,&Ii,1,&J,&v,INSERT_VALUES);}
36: v = 4.0; MatSetValues(C,1,&Ii,1,&Ii,&v,INSERT_VALUES);
37: }
38: }
39: MatAssemblyBegin(C,MAT_FINAL_ASSEMBLY);
40: MatAssemblyEnd(C,MAT_FINAL_ASSEMBLY);
41: MatView(C,PETSC_VIEWER_STDOUT_WORLD);
43: MatCreateVecs(C,NULL,&yy);
44: VecSetFromOptions(yy);
46: MatGetColumnVector(C,yy,col);
48: VecView(yy,PETSC_VIEWER_STDOUT_WORLD);
50: VecDestroy(&yy);
51: MatDestroy(&C);
52: PetscFinalize();
53: return 0;
54: }
56: /*TEST
58: test:
59: nsize: 3
60: args: -col 7
62: test:
63: suffix: dense
64: nsize: 3
65: args: -col 7 -mat_type dense -vec_type {{mpi standard}}
66: filter: grep -v type
68: test:
69: requires: cuda
70: suffix: dense_cuda
71: nsize: 3
72: output_file: output/ex60_dense.out
73: args: -col 7 -mat_type {{mpidense mpidensecuda}} -vec_type {{mpi standard cuda mpicuda}}
74: filter: grep -v type
76: TEST*/