Actual source code: ex88.c
2: static char help[] = "Tests MatShift(), MatScale(), and MatDiagonalScale() for SHELL and NEST matrices\n\n";
4: #include <petscmat.h>
6: typedef struct _n_User *User;
7: struct _n_User {
8: Mat B;
9: };
11: static PetscErrorCode MatView_User(Mat A,PetscViewer viewer)
12: {
13: User user;
15: MatShellGetContext(A,&user);
16: MatView(user->B,viewer);
17: return 0;
18: }
20: static PetscErrorCode MatMult_User(Mat A,Vec X,Vec Y)
21: {
22: User user;
24: MatShellGetContext(A,&user);
25: MatMult(user->B,X,Y);
26: return 0;
27: }
29: static PetscErrorCode MatMultTranspose_User(Mat A,Vec X,Vec Y)
30: {
31: User user;
33: MatShellGetContext(A,&user);
34: MatMultTranspose(user->B,X,Y);
35: return 0;
36: }
38: static PetscErrorCode MatGetDiagonal_User(Mat A,Vec X)
39: {
40: User user;
42: MatShellGetContext(A,&user);
43: MatGetDiagonal(user->B,X);
44: return 0;
45: }
47: static PetscErrorCode TestMatrix(Mat A,Vec X,Vec Y,Vec Z)
48: {
49: Vec W1,W2,diff;
50: Mat E;
51: const char *mattypename;
52: PetscViewer viewer = PETSC_VIEWER_STDOUT_WORLD;
53: PetscScalar diag[2] = { 2.9678190300000000e+08, 1.4173141580000000e+09};
54: PetscScalar multadd[2] = {-6.8966198500000000e+08,-2.0310609940000000e+09};
55: PetscScalar multtadd[2] = {-9.1052873900000000e+08,-1.8101942400000000e+09};
56: PetscReal nrm;
58: PetscObjectGetType((PetscObject)A,&mattypename);
59: PetscViewerASCIIPrintf(viewer,"\nMatrix of type: %s\n",mattypename);
60: VecDuplicate(X,&W1);
61: VecDuplicate(X,&W2);
62: MatScale(A,31);
63: MatShift(A,37);
64: MatDiagonalScale(A,X,Y);
65: MatScale(A,41);
66: MatDiagonalScale(A,Y,Z);
67: MatComputeOperator(A,MATDENSE,&E);
69: MatView(E,viewer);
70: PetscViewerASCIIPrintf(viewer,"Testing MatMult + MatMultTranspose\n");
71: MatMult(A,Z,W1);
72: MatMultTranspose(A,W1,W2);
73: VecView(W2,viewer);
75: PetscViewerASCIIPrintf(viewer,"Testing MatMultAdd\n");
76: VecCreateSeqWithArray(PETSC_COMM_SELF,1,2,multadd,&diff);
77: VecSet(W1,-1.0);
78: MatMultAdd(A,W1,W1,W2);
79: VecView(W2,viewer);
80: VecAXPY(W2,-1.0,diff);
81: VecNorm(W2,NORM_2,&nrm);
82: #if defined(PETSC_USE_REAL_DOUBLE) || defined(PETSC_USE_REAL___FLOAT128)
84: #endif
86: VecSet(W2,-1.0);
87: MatMultAdd(A,W1,W2,W2);
88: VecView(W2,viewer);
89: VecAXPY(W2,-1.0,diff);
90: VecNorm(W2,NORM_2,&nrm);
91: #if defined(PETSC_USE_REAL_DOUBLE) || defined(PETSC_USE_REAL___FLOAT128)
93: #endif
94: VecDestroy(&diff);
96: PetscViewerASCIIPrintf(viewer,"Testing MatMultTransposeAdd\n");
97: VecCreateSeqWithArray(PETSC_COMM_SELF,1,2,multtadd,&diff);
99: VecSet(W1,-1.0);
100: MatMultTransposeAdd(A,W1,W1,W2);
101: VecView(W2,viewer);
102: VecAXPY(W2,-1.0,diff);
103: VecNorm(W2,NORM_2,&nrm);
104: #if defined(PETSC_USE_REAL_DOUBLE) || defined(PETSC_USE_REAL___FLOAT128)
106: #endif
108: VecSet(W2,-1.0);
109: MatMultTransposeAdd(A,W1,W2,W2);
110: VecView(W2,viewer);
111: VecAXPY(W2,-1.0,diff);
112: VecNorm(W2,NORM_2,&nrm);
113: #if defined(PETSC_USE_REAL_DOUBLE) || defined(PETSC_USE_REAL___FLOAT128)
115: #endif
116: VecDestroy(&diff);
118: PetscViewerASCIIPrintf(viewer,"Testing MatGetDiagonal\n");
119: MatGetDiagonal(A,W2);
120: VecView(W2,viewer);
121: VecCreateSeqWithArray(PETSC_COMM_SELF,1,2,diag,&diff);
122: VecAXPY(diff,-1.0,W2);
123: VecNorm(diff,NORM_2,&nrm);
125: VecDestroy(&diff);
127: /* MATSHELL does not support MatDiagonalSet after MatScale */
128: if (strncmp(mattypename, "shell", 5)) {
129: MatDiagonalSet(A,X,INSERT_VALUES);
130: MatGetDiagonal(A,W1);
131: VecView(W1,viewer);
132: } else {
133: PetscViewerASCIIPrintf(viewer,"MatDiagonalSet not tested on MATSHELL\n");
134: }
136: MatDestroy(&E);
137: VecDestroy(&W1);
138: VecDestroy(&W2);
139: return 0;
140: }
142: int main(int argc,char **args)
143: {
144: const PetscScalar xvals[] = {11,13},yvals[] = {17,19},zvals[] = {23,29};
145: const PetscInt inds[] = {0,1};
146: PetscScalar avals[] = {2,3,5,7};
147: Mat A,S,D[4],N;
148: Vec X,Y,Z;
149: User user;
150: PetscInt i;
152: PetscInitialize(&argc,&args,(char*)0,help);
153: MatCreateSeqAIJ(PETSC_COMM_WORLD,2,2,2,NULL,&A);
154: MatSetUp(A);
155: MatSetValues(A,2,inds,2,inds,avals,INSERT_VALUES);
156: VecCreateSeq(PETSC_COMM_WORLD,2,&X);
157: VecDuplicate(X,&Y);
158: VecDuplicate(X,&Z);
159: VecSetValues(X,2,inds,xvals,INSERT_VALUES);
160: VecSetValues(Y,2,inds,yvals,INSERT_VALUES);
161: VecSetValues(Z,2,inds,zvals,INSERT_VALUES);
162: MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY);
163: MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY);
164: VecAssemblyBegin(X);
165: VecAssemblyBegin(Y);
166: VecAssemblyBegin(Z);
167: VecAssemblyEnd(X);
168: VecAssemblyEnd(Y);
169: VecAssemblyEnd(Z);
171: PetscNew(&user);
172: user->B = A;
174: MatCreateShell(PETSC_COMM_WORLD,2,2,2,2,user,&S);
175: MatSetUp(S);
176: MatShellSetOperation(S,MATOP_VIEW,(void (*)(void))MatView_User);
177: MatShellSetOperation(S,MATOP_MULT,(void (*)(void))MatMult_User);
178: MatShellSetOperation(S,MATOP_MULT_TRANSPOSE,(void (*)(void))MatMultTranspose_User);
179: MatShellSetOperation(S,MATOP_GET_DIAGONAL,(void (*)(void))MatGetDiagonal_User);
181: for (i=0; i<4; i++) {
182: MatCreateSeqDense(PETSC_COMM_WORLD,1,1,&avals[i],&D[i]);
183: }
184: MatCreateNest(PETSC_COMM_WORLD,2,NULL,2,NULL,D,&N);
185: MatSetUp(N);
187: TestMatrix(S,X,Y,Z);
188: TestMatrix(A,X,Y,Z);
189: TestMatrix(N,X,Y,Z);
191: for (i=0; i<4; i++) MatDestroy(&D[i]);
192: MatDestroy(&A);
193: MatDestroy(&S);
194: MatDestroy(&N);
195: VecDestroy(&X);
196: VecDestroy(&Y);
197: VecDestroy(&Z);
198: PetscFree(user);
199: PetscFinalize();
200: return 0;
201: }
203: /*TEST
205: test:
207: TEST*/