| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - | ||
| 3 | SLEPc - Scalable Library for Eigenvalue Problem Computations | ||
| 4 | Copyright (c) 2002-, Universitat Politecnica de Valencia, Spain | ||
| 5 | |||
| 6 | This file is part of SLEPc. | ||
| 7 | SLEPc is distributed under a 2-clause BSD license (see LICENSE). | ||
| 8 | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - | ||
| 9 | */ | ||
| 10 | /* | ||
| 11 | Basic SVD routines | ||
| 12 | */ | ||
| 13 | |||
| 14 | #include <slepc/private/svdimpl.h> /*I "slepcsvd.h" I*/ | ||
| 15 | |||
| 16 | /* Logging support */ | ||
| 17 | PetscClassId SVD_CLASSID = 0; | ||
| 18 | PetscLogEvent SVD_SetUp = 0,SVD_Solve = 0; | ||
| 19 | |||
| 20 | /* List of registered SVD routines */ | ||
| 21 | PetscFunctionList SVDList = NULL; | ||
| 22 | PetscBool SVDRegisterAllCalled = PETSC_FALSE; | ||
| 23 | |||
| 24 | /* List of registered SVD monitors */ | ||
| 25 | PetscFunctionList SVDMonitorList = NULL; | ||
| 26 | PetscFunctionList SVDMonitorCreateList = NULL; | ||
| 27 | PetscFunctionList SVDMonitorDestroyList = NULL; | ||
| 28 | PetscBool SVDMonitorRegisterAllCalled = PETSC_FALSE; | ||
| 29 | |||
| 30 | /*@ | ||
| 31 | SVDCreate - Creates the default SVD context. | ||
| 32 | |||
| 33 | Collective | ||
| 34 | |||
| 35 | Input Parameter: | ||
| 36 | . comm - MPI communicator | ||
| 37 | |||
| 38 | Output Parameter: | ||
| 39 | . outsvd - location to put the SVD context | ||
| 40 | |||
| 41 | Note: | ||
| 42 | The default SVD type is SVDCROSS | ||
| 43 | |||
| 44 | Level: beginner | ||
| 45 | |||
| 46 | .seealso: SVDSetUp(), SVDSolve(), SVDDestroy(), SVD | ||
| 47 | @*/ | ||
| 48 | 2388 | PetscErrorCode SVDCreate(MPI_Comm comm,SVD *outsvd) | |
| 49 | { | ||
| 50 | 2388 | SVD svd; | |
| 51 | |||
| 52 |
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2388 | PetscFunctionBegin; |
| 53 |
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2388 | PetscAssertPointer(outsvd,2); |
| 54 |
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2388 | PetscCall(SVDInitializePackage()); |
| 55 |
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2388 | PetscCall(SlepcHeaderCreate(svd,SVD_CLASSID,"SVD","Singular Value Decomposition","SVD",comm,SVDDestroy,SVDView)); |
| 56 | |||
| 57 | 2388 | svd->OP = NULL; | |
| 58 | 2388 | svd->OPb = NULL; | |
| 59 | 2388 | svd->omega = NULL; | |
| 60 | 2388 | svd->max_it = PETSC_DETERMINE; | |
| 61 | 2388 | svd->nsv = 0; | |
| 62 | 2388 | svd->ncv = PETSC_DETERMINE; | |
| 63 | 2388 | svd->mpd = PETSC_DETERMINE; | |
| 64 | 2388 | svd->nini = 0; | |
| 65 | 2388 | svd->ninil = 0; | |
| 66 | 2388 | svd->tol = PETSC_DETERMINE; | |
| 67 | 2388 | svd->thres = 0.0; | |
| 68 | 2388 | svd->threlative = PETSC_FALSE; | |
| 69 | 2388 | svd->conv = (SVDConv)-1; | |
| 70 | 2388 | svd->stop = SVD_STOP_BASIC; | |
| 71 | 2388 | svd->which = SVD_LARGEST; | |
| 72 | 2388 | svd->problem_type = (SVDProblemType)0; | |
| 73 | 2388 | svd->impltrans = PETSC_FALSE; | |
| 74 | 2388 | svd->trackall = PETSC_FALSE; | |
| 75 | |||
| 76 | 2388 | svd->converged = NULL; | |
| 77 | 2388 | svd->convergeduser = NULL; | |
| 78 | 2388 | svd->convergeddestroy = NULL; | |
| 79 | 2388 | svd->stopping = SVDStoppingBasic; | |
| 80 | 2388 | svd->stoppinguser = NULL; | |
| 81 | 2388 | svd->stoppingdestroy = NULL; | |
| 82 | 2388 | svd->convergedctx = NULL; | |
| 83 | 2388 | svd->stoppingctx = NULL; | |
| 84 | 2388 | svd->numbermonitors = 0; | |
| 85 | |||
| 86 | 2388 | svd->ds = NULL; | |
| 87 | 2388 | svd->U = NULL; | |
| 88 | 2388 | svd->V = NULL; | |
| 89 | 2388 | svd->A = NULL; | |
| 90 | 2388 | svd->B = NULL; | |
| 91 | 2388 | svd->AT = NULL; | |
| 92 | 2388 | svd->BT = NULL; | |
| 93 | 2388 | svd->IS = NULL; | |
| 94 | 2388 | svd->ISL = NULL; | |
| 95 | 2388 | svd->sigma = NULL; | |
| 96 | 2388 | svd->errest = NULL; | |
| 97 | 2388 | svd->sign = NULL; | |
| 98 | 2388 | svd->perm = NULL; | |
| 99 | 2388 | svd->nworkl = 0; | |
| 100 | 2388 | svd->nworkr = 0; | |
| 101 | 2388 | svd->workl = NULL; | |
| 102 | 2388 | svd->workr = NULL; | |
| 103 | 2388 | svd->data = NULL; | |
| 104 | |||
| 105 | 2388 | svd->state = SVD_STATE_INITIAL; | |
| 106 | 2388 | svd->nconv = 0; | |
| 107 | 2388 | svd->its = 0; | |
| 108 | 2388 | svd->leftbasis = PETSC_FALSE; | |
| 109 | 2388 | svd->swapped = PETSC_FALSE; | |
| 110 | 2388 | svd->expltrans = PETSC_FALSE; | |
| 111 | 2388 | svd->nrma = 0.0; | |
| 112 | 2388 | svd->nrmb = 0.0; | |
| 113 | 2388 | svd->isgeneralized = PETSC_FALSE; | |
| 114 | 2388 | svd->reason = SVD_CONVERGED_ITERATING; | |
| 115 | |||
| 116 |
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2388 | PetscCall(PetscNew(&svd->sc)); |
| 117 | 2388 | *outsvd = svd; | |
| 118 |
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2388 | PetscFunctionReturn(PETSC_SUCCESS); |
| 119 | } | ||
| 120 | |||
| 121 | /*@ | ||
| 122 | SVDReset - Resets the SVD context to the initial state (prior to setup) | ||
| 123 | and destroys any allocated Vecs and Mats. | ||
| 124 | |||
| 125 | Collective | ||
| 126 | |||
| 127 | Input Parameter: | ||
| 128 | . svd - singular value solver context obtained from SVDCreate() | ||
| 129 | |||
| 130 | Level: advanced | ||
| 131 | |||
| 132 | .seealso: SVDDestroy() | ||
| 133 | @*/ | ||
| 134 | 2448 | PetscErrorCode SVDReset(SVD svd) | |
| 135 | { | ||
| 136 |
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2448 | PetscFunctionBegin; |
| 137 |
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2448 | if (svd) PetscValidHeaderSpecific(svd,SVD_CLASSID,1); |
| 138 |
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2199 | if (!svd) PetscFunctionReturn(PETSC_SUCCESS); |
| 139 |
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2448 | PetscTryTypeMethod(svd,reset); |
| 140 |
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2448 | PetscCall(MatDestroy(&svd->OP)); |
| 141 |
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2448 | PetscCall(MatDestroy(&svd->OPb)); |
| 142 |
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2448 | PetscCall(VecDestroy(&svd->omega)); |
| 143 |
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2448 | PetscCall(MatDestroy(&svd->A)); |
| 144 |
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2448 | PetscCall(MatDestroy(&svd->B)); |
| 145 |
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2448 | PetscCall(MatDestroy(&svd->AT)); |
| 146 |
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2448 | PetscCall(MatDestroy(&svd->BT)); |
| 147 |
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2448 | PetscCall(BVDestroy(&svd->U)); |
| 148 |
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2448 | PetscCall(BVDestroy(&svd->V)); |
| 149 |
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2448 | PetscCall(VecDestroyVecs(svd->nworkl,&svd->workl)); |
| 150 | 2448 | svd->nworkl = 0; | |
| 151 |
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2448 | PetscCall(VecDestroyVecs(svd->nworkr,&svd->workr)); |
| 152 | 2448 | svd->nworkr = 0; | |
| 153 | 2448 | svd->swapped = PETSC_FALSE; | |
| 154 | 2448 | svd->state = SVD_STATE_INITIAL; | |
| 155 |
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2448 | PetscFunctionReturn(PETSC_SUCCESS); |
| 156 | } | ||
| 157 | |||
| 158 | /*@ | ||
| 159 | SVDDestroy - Destroys the SVD context. | ||
| 160 | |||
| 161 | Collective | ||
| 162 | |||
| 163 | Input Parameter: | ||
| 164 | . svd - singular value solver context obtained from SVDCreate() | ||
| 165 | |||
| 166 | Level: beginner | ||
| 167 | |||
| 168 | .seealso: SVDCreate(), SVDSetUp(), SVDSolve() | ||
| 169 | @*/ | ||
| 170 | 2409 | PetscErrorCode SVDDestroy(SVD *svd) | |
| 171 | { | ||
| 172 |
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2409 | PetscFunctionBegin; |
| 173 |
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2409 | if (!*svd) PetscFunctionReturn(PETSC_SUCCESS); |
| 174 |
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2409 | PetscValidHeaderSpecific(*svd,SVD_CLASSID,1); |
| 175 |
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2409 | if (--((PetscObject)*svd)->refct > 0) { *svd = NULL; PetscFunctionReturn(PETSC_SUCCESS); } |
| 176 |
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2388 | PetscCall(SVDReset(*svd)); |
| 177 |
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2388 | PetscTryTypeMethod(*svd,destroy); |
| 178 |
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2388 | if ((*svd)->sigma) PetscCall(PetscFree3((*svd)->sigma,(*svd)->perm,(*svd)->errest)); |
| 179 |
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2388 | if ((*svd)->sign) PetscCall(PetscFree((*svd)->sign)); |
| 180 |
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2388 | PetscCall(DSDestroy(&(*svd)->ds)); |
| 181 |
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2388 | PetscCall(PetscFree((*svd)->sc)); |
| 182 | /* just in case the initial vectors have not been used */ | ||
| 183 |
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2388 | PetscCall(SlepcBasisDestroy_Private(&(*svd)->nini,&(*svd)->IS)); |
| 184 |
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2388 | PetscCall(SlepcBasisDestroy_Private(&(*svd)->ninil,&(*svd)->ISL)); |
| 185 |
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2388 | if ((*svd)->convergeddestroy) PetscCall((*(*svd)->convergeddestroy)(&(*svd)->convergedctx)); |
| 186 |
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2388 | if ((*svd)->stoppingdestroy) PetscCall((*(*svd)->stoppingdestroy)(&(*svd)->stoppingctx)); |
| 187 |
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2388 | PetscCall(SVDMonitorCancel(*svd)); |
| 188 |
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2388 | PetscCall(PetscHeaderDestroy(svd)); |
| 189 |
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453 | PetscFunctionReturn(PETSC_SUCCESS); |
| 190 | } | ||
| 191 | |||
| 192 | /*@ | ||
| 193 | SVDSetType - Selects the particular solver to be used in the SVD object. | ||
| 194 | |||
| 195 | Logically Collective | ||
| 196 | |||
| 197 | Input Parameters: | ||
| 198 | + svd - the singular value solver context | ||
| 199 | - type - a known method | ||
| 200 | |||
| 201 | Options Database Key: | ||
| 202 | . -svd_type <method> - Sets the method; use -help for a list | ||
| 203 | of available methods | ||
| 204 | |||
| 205 | Notes: | ||
| 206 | See "slepc/include/slepcsvd.h" for available methods. The default | ||
| 207 | is SVDCROSS. | ||
| 208 | |||
| 209 | Normally, it is best to use the SVDSetFromOptions() command and | ||
| 210 | then set the SVD type from the options database rather than by using | ||
| 211 | this routine. Using the options database provides the user with | ||
| 212 | maximum flexibility in evaluating the different available methods. | ||
| 213 | The SVDSetType() routine is provided for those situations where it | ||
| 214 | is necessary to set the iterative solver independently of the command | ||
| 215 | line or options database. | ||
| 216 | |||
| 217 | Level: intermediate | ||
| 218 | |||
| 219 | .seealso: SVDType | ||
| 220 | @*/ | ||
| 221 | 2319 | PetscErrorCode SVDSetType(SVD svd,SVDType type) | |
| 222 | { | ||
| 223 | 2319 | PetscErrorCode (*r)(SVD); | |
| 224 | 2319 | PetscBool match; | |
| 225 | |||
| 226 |
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2319 | PetscFunctionBegin; |
| 227 |
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2319 | PetscValidHeaderSpecific(svd,SVD_CLASSID,1); |
| 228 |
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2319 | PetscAssertPointer(type,2); |
| 229 | |||
| 230 |
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2319 | PetscCall(PetscObjectTypeCompare((PetscObject)svd,type,&match)); |
| 231 |
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2319 | if (match) PetscFunctionReturn(PETSC_SUCCESS); |
| 232 | |||
| 233 |
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2319 | PetscCall(PetscFunctionListFind(SVDList,type,&r)); |
| 234 |
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2319 | PetscCheck(r,PetscObjectComm((PetscObject)svd),PETSC_ERR_ARG_UNKNOWN_TYPE,"Unknown SVD type given: %s",type); |
| 235 | |||
| 236 |
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2319 | PetscTryTypeMethod(svd,destroy); |
| 237 |
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2319 | PetscCall(PetscMemzero(svd->ops,sizeof(struct _SVDOps))); |
| 238 | |||
| 239 | 2319 | svd->state = SVD_STATE_INITIAL; | |
| 240 |
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2319 | PetscCall(PetscObjectChangeTypeName((PetscObject)svd,type)); |
| 241 |
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2319 | PetscCall((*r)(svd)); |
| 242 |
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455 | PetscFunctionReturn(PETSC_SUCCESS); |
| 243 | } | ||
| 244 | |||
| 245 | /*@ | ||
| 246 | SVDGetType - Gets the SVD type as a string from the SVD object. | ||
| 247 | |||
| 248 | Not Collective | ||
| 249 | |||
| 250 | Input Parameter: | ||
| 251 | . svd - the singular value solver context | ||
| 252 | |||
| 253 | Output Parameter: | ||
| 254 | . type - name of SVD method | ||
| 255 | |||
| 256 | Level: intermediate | ||
| 257 | |||
| 258 | .seealso: SVDSetType() | ||
| 259 | @*/ | ||
| 260 | 582 | PetscErrorCode SVDGetType(SVD svd,SVDType *type) | |
| 261 | { | ||
| 262 |
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582 | PetscFunctionBegin; |
| 263 |
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582 | PetscValidHeaderSpecific(svd,SVD_CLASSID,1); |
| 264 |
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582 | PetscAssertPointer(type,2); |
| 265 | 582 | *type = ((PetscObject)svd)->type_name; | |
| 266 |
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582 | PetscFunctionReturn(PETSC_SUCCESS); |
| 267 | } | ||
| 268 | |||
| 269 | /*@C | ||
| 270 | SVDRegister - Adds a method to the singular value solver package. | ||
| 271 | |||
| 272 | Not Collective | ||
| 273 | |||
| 274 | Input Parameters: | ||
| 275 | + name - name of a new user-defined solver | ||
| 276 | - function - routine to create the solver context | ||
| 277 | |||
| 278 | Notes: | ||
| 279 | SVDRegister() may be called multiple times to add several user-defined solvers. | ||
| 280 | |||
| 281 | Example Usage: | ||
| 282 | .vb | ||
| 283 | SVDRegister("my_solver",MySolverCreate); | ||
| 284 | .ve | ||
| 285 | |||
| 286 | Then, your solver can be chosen with the procedural interface via | ||
| 287 | $ SVDSetType(svd,"my_solver") | ||
| 288 | or at runtime via the option | ||
| 289 | $ -svd_type my_solver | ||
| 290 | |||
| 291 | Level: advanced | ||
| 292 | |||
| 293 | .seealso: SVDRegisterAll() | ||
| 294 | @*/ | ||
| 295 | 16888 | PetscErrorCode SVDRegister(const char *name,PetscErrorCode (*function)(SVD)) | |
| 296 | { | ||
| 297 |
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16888 | PetscFunctionBegin; |
| 298 |
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16888 | PetscCall(SVDInitializePackage()); |
| 299 |
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16888 | PetscCall(PetscFunctionListAdd(&SVDList,name,function)); |
| 300 |
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3185 | PetscFunctionReturn(PETSC_SUCCESS); |
| 301 | } | ||
| 302 | |||
| 303 | /*@C | ||
| 304 | SVDMonitorRegister - Registers an SVD monitor routine that may be accessed with SVDMonitorSetFromOptions(). | ||
| 305 | |||
| 306 | Not Collective | ||
| 307 | |||
| 308 | Input Parameters: | ||
| 309 | + name - name of a new monitor routine | ||
| 310 | . vtype - a PetscViewerType for the output | ||
| 311 | . format - a PetscViewerFormat for the output | ||
| 312 | . monitor - monitor routine, see SVDMonitorRegisterFn | ||
| 313 | . create - creation routine, or NULL | ||
| 314 | - destroy - destruction routine, or NULL | ||
| 315 | |||
| 316 | Notes: | ||
| 317 | SVDMonitorRegister() may be called multiple times to add several user-defined monitors. | ||
| 318 | |||
| 319 | The calling sequence for the given function matches the calling sequence of SVDMonitorFn | ||
| 320 | functions passed to SVDMonitorSet() with the additional requirement that its final argument | ||
| 321 | be a PetscViewerAndFormat. | ||
| 322 | |||
| 323 | Example Usage: | ||
| 324 | .vb | ||
| 325 | SVDMonitorRegister("my_monitor",PETSCVIEWERASCII,PETSC_VIEWER_ASCII_INFO_DETAIL,MyMonitor,NULL,NULL); | ||
| 326 | .ve | ||
| 327 | |||
| 328 | Then, your monitor can be chosen with the procedural interface via | ||
| 329 | $ SVDMonitorSetFromOptions(svd,"-svd_monitor_my_monitor","my_monitor",NULL) | ||
| 330 | or at runtime via the option | ||
| 331 | $ -svd_monitor_my_monitor | ||
| 332 | |||
| 333 | Level: advanced | ||
| 334 | |||
| 335 | .seealso: SVDMonitorSet(), SVDMonitorRegisterAll() | ||
| 336 | @*/ | ||
| 337 | 16282 | PetscErrorCode SVDMonitorRegister(const char name[],PetscViewerType vtype,PetscViewerFormat format,SVDMonitorRegisterFn *monitor,SVDMonitorRegisterCreateFn *create,SVDMonitorRegisterDestroyFn *destroy) | |
| 338 | { | ||
| 339 | 16282 | char key[PETSC_MAX_PATH_LEN]; | |
| 340 | |||
| 341 |
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16282 | PetscFunctionBegin; |
| 342 |
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16282 | PetscCall(SVDInitializePackage()); |
| 343 |
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16282 | PetscCall(SlepcMonitorMakeKey_Internal(name,vtype,format,key)); |
| 344 |
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16282 | PetscCall(PetscFunctionListAdd(&SVDMonitorList,key,monitor)); |
| 345 |
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16282 | if (create) PetscCall(PetscFunctionListAdd(&SVDMonitorCreateList,key,create)); |
| 346 |
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16282 | if (destroy) PetscCall(PetscFunctionListAdd(&SVDMonitorDestroyList,key,destroy)); |
| 347 |
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3185 | PetscFunctionReturn(PETSC_SUCCESS); |
| 348 | } | ||
| 349 | |||
| 350 | /*@ | ||
| 351 | SVDSetBV - Associates basis vectors objects to the singular value solver. | ||
| 352 | |||
| 353 | Collective | ||
| 354 | |||
| 355 | Input Parameters: | ||
| 356 | + svd - singular value solver context obtained from SVDCreate() | ||
| 357 | . V - the basis vectors object for right singular vectors | ||
| 358 | - U - the basis vectors object for left singular vectors | ||
| 359 | |||
| 360 | Note: | ||
| 361 | Use SVDGetBV() to retrieve the basis vectors contexts (for example, | ||
| 362 | to free them at the end of the computations). | ||
| 363 | |||
| 364 | Level: advanced | ||
| 365 | |||
| 366 | .seealso: SVDGetBV() | ||
| 367 | @*/ | ||
| 368 | 30 | PetscErrorCode SVDSetBV(SVD svd,BV V,BV U) | |
| 369 | { | ||
| 370 |
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30 | PetscFunctionBegin; |
| 371 |
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30 | PetscValidHeaderSpecific(svd,SVD_CLASSID,1); |
| 372 |
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30 | if (V) { |
| 373 |
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30 | PetscValidHeaderSpecific(V,BV_CLASSID,2); |
| 374 |
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30 | PetscCheckSameComm(svd,1,V,2); |
| 375 |
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30 | PetscCall(PetscObjectReference((PetscObject)V)); |
| 376 |
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30 | PetscCall(BVDestroy(&svd->V)); |
| 377 | 30 | svd->V = V; | |
| 378 | } | ||
| 379 |
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30 | if (U) { |
| 380 |
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30 | PetscValidHeaderSpecific(U,BV_CLASSID,3); |
| 381 |
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30 | PetscCheckSameComm(svd,1,U,3); |
| 382 |
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30 | PetscCall(PetscObjectReference((PetscObject)U)); |
| 383 |
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30 | PetscCall(BVDestroy(&svd->U)); |
| 384 | 30 | svd->U = U; | |
| 385 | } | ||
| 386 |
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6 | PetscFunctionReturn(PETSC_SUCCESS); |
| 387 | } | ||
| 388 | |||
| 389 | /*@ | ||
| 390 | SVDGetBV - Obtain the basis vectors objects associated to the singular | ||
| 391 | value solver object. | ||
| 392 | |||
| 393 | Not Collective | ||
| 394 | |||
| 395 | Input Parameter: | ||
| 396 | . svd - singular value solver context obtained from SVDCreate() | ||
| 397 | |||
| 398 | Output Parameters: | ||
| 399 | + V - basis vectors context for right singular vectors | ||
| 400 | - U - basis vectors context for left singular vectors | ||
| 401 | |||
| 402 | Level: advanced | ||
| 403 | |||
| 404 | .seealso: SVDSetBV() | ||
| 405 | @*/ | ||
| 406 | 4627 | PetscErrorCode SVDGetBV(SVD svd,BV *V,BV *U) | |
| 407 | { | ||
| 408 |
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4627 | PetscFunctionBegin; |
| 409 |
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4627 | PetscValidHeaderSpecific(svd,SVD_CLASSID,1); |
| 410 |
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4627 | if (V) { |
| 411 |
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2327 | if (!svd->V) { |
| 412 |
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2327 | PetscCall(BVCreate(PetscObjectComm((PetscObject)svd),&svd->V)); |
| 413 |
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2327 | PetscCall(PetscObjectIncrementTabLevel((PetscObject)svd->V,(PetscObject)svd,0)); |
| 414 |
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2327 | PetscCall(PetscObjectSetOptions((PetscObject)svd->V,((PetscObject)svd)->options)); |
| 415 | } | ||
| 416 | 2327 | *V = svd->V; | |
| 417 | } | ||
| 418 |
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4627 | if (U) { |
| 419 |
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2307 | if (!svd->U) { |
| 420 |
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2307 | PetscCall(BVCreate(PetscObjectComm((PetscObject)svd),&svd->U)); |
| 421 |
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2307 | PetscCall(PetscObjectIncrementTabLevel((PetscObject)svd->U,(PetscObject)svd,0)); |
| 422 |
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2307 | PetscCall(PetscObjectSetOptions((PetscObject)svd->U,((PetscObject)svd)->options)); |
| 423 | } | ||
| 424 | 2307 | *U = svd->U; | |
| 425 | } | ||
| 426 |
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914 | PetscFunctionReturn(PETSC_SUCCESS); |
| 427 | } | ||
| 428 | |||
| 429 | /*@ | ||
| 430 | SVDSetDS - Associates a direct solver object to the singular value solver. | ||
| 431 | |||
| 432 | Collective | ||
| 433 | |||
| 434 | Input Parameters: | ||
| 435 | + svd - singular value solver context obtained from SVDCreate() | ||
| 436 | - ds - the direct solver object | ||
| 437 | |||
| 438 | Note: | ||
| 439 | Use SVDGetDS() to retrieve the direct solver context (for example, | ||
| 440 | to free it at the end of the computations). | ||
| 441 | |||
| 442 | Level: advanced | ||
| 443 | |||
| 444 | .seealso: SVDGetDS() | ||
| 445 | @*/ | ||
| 446 | ✗ | PetscErrorCode SVDSetDS(SVD svd,DS ds) | |
| 447 | { | ||
| 448 | ✗ | PetscFunctionBegin; | |
| 449 | ✗ | PetscValidHeaderSpecific(svd,SVD_CLASSID,1); | |
| 450 | ✗ | PetscValidHeaderSpecific(ds,DS_CLASSID,2); | |
| 451 | ✗ | PetscCheckSameComm(svd,1,ds,2); | |
| 452 | ✗ | PetscCall(PetscObjectReference((PetscObject)ds)); | |
| 453 | ✗ | PetscCall(DSDestroy(&svd->ds)); | |
| 454 | ✗ | svd->ds = ds; | |
| 455 | ✗ | PetscFunctionReturn(PETSC_SUCCESS); | |
| 456 | } | ||
| 457 | |||
| 458 | /*@ | ||
| 459 | SVDGetDS - Obtain the direct solver object associated to the singular value | ||
| 460 | solver object. | ||
| 461 | |||
| 462 | Not Collective | ||
| 463 | |||
| 464 | Input Parameters: | ||
| 465 | . svd - singular value solver context obtained from SVDCreate() | ||
| 466 | |||
| 467 | Output Parameter: | ||
| 468 | . ds - direct solver context | ||
| 469 | |||
| 470 | Level: advanced | ||
| 471 | |||
| 472 | .seealso: SVDSetDS() | ||
| 473 | @*/ | ||
| 474 | 2297 | PetscErrorCode SVDGetDS(SVD svd,DS *ds) | |
| 475 | { | ||
| 476 |
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2297 | PetscFunctionBegin; |
| 477 |
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2297 | PetscValidHeaderSpecific(svd,SVD_CLASSID,1); |
| 478 |
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2297 | PetscAssertPointer(ds,2); |
| 479 |
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2297 | if (!svd->ds) { |
| 480 |
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2297 | PetscCall(DSCreate(PetscObjectComm((PetscObject)svd),&svd->ds)); |
| 481 |
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2297 | PetscCall(PetscObjectIncrementTabLevel((PetscObject)svd->ds,(PetscObject)svd,0)); |
| 482 |
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2297 | PetscCall(PetscObjectSetOptions((PetscObject)svd->ds,((PetscObject)svd)->options)); |
| 483 | } | ||
| 484 | 2297 | *ds = svd->ds; | |
| 485 |
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2297 | PetscFunctionReturn(PETSC_SUCCESS); |
| 486 | } | ||
| 487 |