Actual source code: submatfree.c
1: #include <petsctao.h>
2: #include <../src/tao/matrix/submatfree.h>
4: /*@C
5: MatCreateSubMatrixFree - Creates a reduced matrix by masking a
6: full matrix.
8: Collective on matrix
10: Input Parameters:
11: + mat - matrix of arbitrary type
12: . Rows - the rows that will be in the submatrix
13: - Cols - the columns that will be in the submatrix
15: Output Parameters:
16: . J - New matrix
18: Notes:
19: The caller is responsible for destroying the input objects after matrix J has been destroyed.
21: Level: developer
23: .seealso: MatCreate()
24: @*/
25: PetscErrorCode MatCreateSubMatrixFree(Mat mat,IS Rows, IS Cols, Mat *J)
26: {
27: MPI_Comm comm=PetscObjectComm((PetscObject)mat);
28: MatSubMatFreeCtx ctx;
29: PetscErrorCode ierr;
30: PetscInt mloc,nloc,m,n;
33: PetscNew(&ctx);
34: ctx->A = mat;
35: MatGetSize(mat,&m,&n);
36: MatGetLocalSize(mat,&mloc,&nloc);
37: MatCreateVecs(mat,NULL,&ctx->VC);
38: ctx->VR = ctx->VC;
39: PetscObjectReference((PetscObject)mat);
41: ctx->Rows = Rows;
42: ctx->Cols = Cols;
43: PetscObjectReference((PetscObject)Rows);
44: PetscObjectReference((PetscObject)Cols);
45: MatCreateShell(comm,mloc,nloc,m,n,ctx,J);
46: MatShellSetManageScalingShifts(*J);
47: MatShellSetOperation(*J,MATOP_MULT,(void(*)(void))MatMult_SMF);
48: MatShellSetOperation(*J,MATOP_DESTROY,(void(*)(void))MatDestroy_SMF);
49: MatShellSetOperation(*J,MATOP_VIEW,(void(*)(void))MatView_SMF);
50: MatShellSetOperation(*J,MATOP_MULT_TRANSPOSE,(void(*)(void))MatMultTranspose_SMF);
51: MatShellSetOperation(*J,MATOP_DIAGONAL_SET,(void(*)(void))MatDiagonalSet_SMF);
52: MatShellSetOperation(*J,MATOP_SHIFT,(void(*)(void))MatShift_SMF);
53: MatShellSetOperation(*J,MATOP_EQUAL,(void(*)(void))MatEqual_SMF);
54: MatShellSetOperation(*J,MATOP_SCALE,(void(*)(void))MatScale_SMF);
55: MatShellSetOperation(*J,MATOP_TRANSPOSE,(void(*)(void))MatTranspose_SMF);
56: MatShellSetOperation(*J,MATOP_GET_DIAGONAL,(void(*)(void))MatGetDiagonal_SMF);
57: MatShellSetOperation(*J,MATOP_CREATE_SUBMATRICES,(void(*)(void))MatCreateSubMatrices_SMF);
58: MatShellSetOperation(*J,MATOP_NORM,(void(*)(void))MatNorm_SMF);
59: MatShellSetOperation(*J,MATOP_DUPLICATE,(void(*)(void))MatDuplicate_SMF);
60: MatShellSetOperation(*J,MATOP_CREATE_SUBMATRIX,(void(*)(void))MatCreateSubMatrix_SMF);
61: MatShellSetOperation(*J,MATOP_GET_ROW_MAX,(void(*)(void))MatDuplicate_SMF);
63: PetscLogObjectParent((PetscObject)mat,(PetscObject)(*J));
64: return(0);
65: }
67: PetscErrorCode MatSMFResetRowColumn(Mat mat,IS Rows,IS Cols)
68: {
69: MatSubMatFreeCtx ctx;
70: PetscErrorCode ierr;
73: MatShellGetContext(mat,&ctx);
74: ISDestroy(&ctx->Rows);
75: ISDestroy(&ctx->Cols);
76: PetscObjectReference((PetscObject)Rows);
77: PetscObjectReference((PetscObject)Cols);
78: ctx->Cols=Cols;
79: ctx->Rows=Rows;
80: return(0);
81: }
83: PetscErrorCode MatMult_SMF(Mat mat,Vec a,Vec y)
84: {
85: MatSubMatFreeCtx ctx;
86: PetscErrorCode ierr;
89: MatShellGetContext(mat,&ctx);
90: VecCopy(a,ctx->VR);
91: VecISSet(ctx->VR,ctx->Cols,0.0);
92: MatMult(ctx->A,ctx->VR,y);
93: VecISSet(y,ctx->Rows,0.0);
94: return(0);
95: }
97: PetscErrorCode MatMultTranspose_SMF(Mat mat,Vec a,Vec y)
98: {
99: MatSubMatFreeCtx ctx;
100: PetscErrorCode ierr;
103: MatShellGetContext(mat,&ctx);
104: VecCopy(a,ctx->VC);
105: VecISSet(ctx->VC,ctx->Rows,0.0);
106: MatMultTranspose(ctx->A,ctx->VC,y);
107: VecISSet(y,ctx->Cols,0.0);
108: return(0);
109: }
111: PetscErrorCode MatDiagonalSet_SMF(Mat M, Vec D,InsertMode is)
112: {
113: MatSubMatFreeCtx ctx;
114: PetscErrorCode ierr;
117: MatShellGetContext(M,&ctx);
118: MatDiagonalSet(ctx->A,D,is);
119: return(0);
120: }
122: PetscErrorCode MatDestroy_SMF(Mat mat)
123: {
124: PetscErrorCode ierr;
125: MatSubMatFreeCtx ctx;
128: MatShellGetContext(mat,&ctx);
129: MatDestroy(&ctx->A);
130: ISDestroy(&ctx->Rows);
131: ISDestroy(&ctx->Cols);
132: VecDestroy(&ctx->VC);
133: PetscFree(ctx);
134: return(0);
135: }
137: PetscErrorCode MatView_SMF(Mat mat,PetscViewer viewer)
138: {
139: PetscErrorCode ierr;
140: MatSubMatFreeCtx ctx;
143: MatShellGetContext(mat,&ctx);
144: MatView(ctx->A,viewer);
145: return(0);
146: }
148: PetscErrorCode MatShift_SMF(Mat Y, PetscReal a)
149: {
150: PetscErrorCode ierr;
151: MatSubMatFreeCtx ctx;
154: MatShellGetContext(Y,&ctx);
155: MatShift(ctx->A,a);
156: return(0);
157: }
159: PetscErrorCode MatDuplicate_SMF(Mat mat,MatDuplicateOption op,Mat *M)
160: {
161: PetscErrorCode ierr;
162: MatSubMatFreeCtx ctx;
165: MatShellGetContext(mat,&ctx);
166: MatCreateSubMatrixFree(ctx->A,ctx->Rows,ctx->Cols,M);
167: return(0);
168: }
170: PetscErrorCode MatEqual_SMF(Mat A,Mat B,PetscBool *flg)
171: {
172: PetscErrorCode ierr;
173: MatSubMatFreeCtx ctx1,ctx2;
174: PetscBool flg1,flg2,flg3;
177: MatShellGetContext(A,&ctx1);
178: MatShellGetContext(B,&ctx2);
179: ISEqual(ctx1->Rows,ctx2->Rows,&flg2);
180: ISEqual(ctx1->Cols,ctx2->Cols,&flg3);
181: if (flg2==PETSC_FALSE || flg3==PETSC_FALSE) {
182: *flg=PETSC_FALSE;
183: } else {
184: MatEqual(ctx1->A,ctx2->A,&flg1);
185: if (flg1==PETSC_FALSE) { *flg=PETSC_FALSE;}
186: else { *flg=PETSC_TRUE;}
187: }
188: return(0);
189: }
191: PetscErrorCode MatScale_SMF(Mat mat, PetscReal a)
192: {
193: PetscErrorCode ierr;
194: MatSubMatFreeCtx ctx;
197: MatShellGetContext(mat,&ctx);
198: MatScale(ctx->A,a);
199: return(0);
200: }
202: PetscErrorCode MatTranspose_SMF(Mat mat,Mat *B)
203: {
205: PetscFunctionReturn(1);
206: }
208: PetscErrorCode MatGetDiagonal_SMF(Mat mat,Vec v)
209: {
210: PetscErrorCode ierr;
211: MatSubMatFreeCtx ctx;
214: MatShellGetContext(mat,&ctx);
215: MatGetDiagonal(ctx->A,v);
216: return(0);
217: }
219: PetscErrorCode MatGetRowMax_SMF(Mat M, Vec D)
220: {
221: MatSubMatFreeCtx ctx;
222: PetscErrorCode ierr;
225: MatShellGetContext(M,&ctx);
226: MatGetRowMax(ctx->A,D,NULL);
227: return(0);
228: }
230: PetscErrorCode MatCreateSubMatrices_SMF(Mat A,PetscInt n, IS *irow,IS *icol,MatReuse scall,Mat **B)
231: {
233: PetscInt i;
236: if (scall == MAT_INITIAL_MATRIX) {
237: PetscCalloc1(n+1,B);
238: }
240: for (i=0; i<n; i++) {
241: MatCreateSubMatrix_SMF(A,irow[i],icol[i],scall,&(*B)[i]);
242: }
243: return(0);
244: }
246: PetscErrorCode MatCreateSubMatrix_SMF(Mat mat,IS isrow,IS iscol,MatReuse cll,
247: Mat *newmat)
248: {
249: PetscErrorCode ierr;
250: MatSubMatFreeCtx ctx;
253: MatShellGetContext(mat,&ctx);
254: if (newmat) {
255: MatDestroy(&*newmat);
256: }
257: MatCreateSubMatrixFree(ctx->A,isrow,iscol, newmat);
258: return(0);
259: }
261: PetscErrorCode MatGetRow_SMF(Mat mat,PetscInt row,PetscInt *ncols,const PetscInt **cols,const PetscScalar **vals)
262: {
263: PetscErrorCode ierr;
264: MatSubMatFreeCtx ctx;
267: MatShellGetContext(mat,&ctx);
268: MatGetRow(ctx->A,row,ncols,cols,vals);
269: return(0);
270: }
272: PetscErrorCode MatRestoreRow_SMF(Mat mat,PetscInt row,PetscInt *ncols,const PetscInt **cols,const PetscScalar **vals)
273: {
274: PetscErrorCode ierr;
275: MatSubMatFreeCtx ctx;
278: MatShellGetContext(mat,&ctx);
279: MatRestoreRow(ctx->A,row,ncols,cols,vals);
280: return(0);
281: }
283: PetscErrorCode MatGetColumnVector_SMF(Mat mat,Vec Y, PetscInt col)
284: {
285: PetscErrorCode ierr;
286: MatSubMatFreeCtx ctx;
289: MatShellGetContext(mat,&ctx);
290: MatGetColumnVector(ctx->A,Y,col);
291: return(0);
292: }
294: PetscErrorCode MatNorm_SMF(Mat mat,NormType type,PetscReal *norm)
295: {
296: PetscErrorCode ierr;
297: MatSubMatFreeCtx ctx;
300: MatShellGetContext(mat,&ctx);
301: if (type == NORM_FROBENIUS) {
302: *norm = 1.0;
303: } else if (type == NORM_1 || type == NORM_INFINITY) {
304: *norm = 1.0;
305: } else SETERRQ(PETSC_COMM_SELF,PETSC_ERR_SUP,"No two norm");
306: return(0);
307: }