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 | static char help[] = "Test DSGSVD with compact storage.\n\n"; | ||
12 | |||
13 | #include <slepcds.h> | ||
14 | |||
15 | 30 | int main(int argc,char **argv) | |
16 | { | ||
17 | 30 | DS ds; | |
18 | 30 | Mat X; | |
19 | 30 | Vec x0; | |
20 | 30 | SlepcSC sc; | |
21 | 30 | PetscReal *T,*D,sigma,rnorm,aux,cond; | |
22 | 30 | PetscScalar *U,*V,*w,d; | |
23 | 30 | PetscInt i,n=10,l=0,k=0,ld; | |
24 | 30 | PetscViewer viewer; | |
25 | 30 | PetscBool verbose,test_dsview,extrarow; | |
26 | |||
27 |
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30 | PetscFunctionBeginUser; |
28 |
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30 | PetscCall(SlepcInitialize(&argc,&argv,NULL,help)); |
29 |
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30 | PetscCall(PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL)); |
30 |
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30 | PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Solve a Dense System of type GSVD with compact storage - dimension %" PetscInt_FMT "x%" PetscInt_FMT ".\n",n,n)); |
31 |
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30 | PetscCall(PetscOptionsGetInt(NULL,NULL,"-l",&l,NULL)); |
32 |
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30 | PetscCall(PetscOptionsGetInt(NULL,NULL,"-k",&k,NULL)); |
33 |
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30 | PetscCheck(l<=n && k<=n && l<=k,PETSC_COMM_WORLD,PETSC_ERR_USER_INPUT,"Wrong value of dimensions"); |
34 |
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30 | PetscCall(PetscOptionsHasName(NULL,NULL,"-verbose",&verbose)); |
35 |
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30 | PetscCall(PetscOptionsHasName(NULL,NULL,"-test_dsview",&test_dsview)); |
36 |
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30 | PetscCall(PetscOptionsHasName(NULL,NULL,"-extrarow",&extrarow)); |
37 | |||
38 | /* Create DS object */ | ||
39 |
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30 | PetscCall(DSCreate(PETSC_COMM_WORLD,&ds)); |
40 |
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30 | PetscCall(DSSetType(ds,DSGSVD)); |
41 |
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30 | PetscCall(DSSetFromOptions(ds)); |
42 | 30 | ld = n+2; /* test leading dimension larger than n */ | |
43 |
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30 | PetscCall(DSAllocate(ds,ld)); |
44 |
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30 | PetscCall(DSSetDimensions(ds,n,l,k)); |
45 |
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30 | PetscCall(DSGSVDSetDimensions(ds,n,PETSC_DECIDE)); |
46 |
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30 | PetscCall(DSSetCompact(ds,PETSC_TRUE)); |
47 |
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30 | PetscCall(DSSetExtraRow(ds,extrarow)); |
48 | |||
49 | /* Set up viewer */ | ||
50 |
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30 | PetscCall(PetscViewerASCIIGetStdout(PETSC_COMM_WORLD,&viewer)); |
51 |
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30 | PetscCall(PetscViewerPushFormat(viewer,PETSC_VIEWER_ASCII_INFO_DETAIL)); |
52 |
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30 | PetscCall(DSView(ds,viewer)); |
53 |
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30 | PetscCall(PetscViewerPopFormat(viewer)); |
54 | |||
55 |
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30 | if (test_dsview) { |
56 | /* Fill A and B with dummy values to test DSView */ | ||
57 |
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10 | PetscCall(DSGetArrayReal(ds,DS_MAT_T,&T)); |
58 |
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10 | PetscCall(DSGetArrayReal(ds,DS_MAT_D,&D)); |
59 |
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110 | for (i=0;i<n;i++) { T[i] = i+1; D[i] = -i-1; } |
60 |
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100 | for (i=0;i<n-1;i++) { T[i+ld] = -1.0; T[i+2*ld] = 1.0; } |
61 |
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10 | PetscCall(DSRestoreArrayReal(ds,DS_MAT_T,&T)); |
62 |
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10 | PetscCall(DSRestoreArrayReal(ds,DS_MAT_D,&D)); |
63 |
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10 | PetscCall(DSView(ds,viewer)); |
64 | } | ||
65 | |||
66 | /* Fill A and B with upper arrow-bidiagonal matrices | ||
67 | verifying that [A;B] has orthonormal columns */ | ||
68 |
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30 | PetscCall(DSGetArrayReal(ds,DS_MAT_T,&T)); |
69 |
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30 | PetscCall(DSGetArrayReal(ds,DS_MAT_D,&D)); |
70 |
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330 | for (i=0;i<n;i++) T[i] = (PetscReal)(i+1)/(n+1); /* diagonal of matrix A */ |
71 |
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110 | for (i=0;i<k;i++) D[i] = PetscSqrtReal(1.0-T[i]*T[i]); |
72 |
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90 | for (i=l;i<k;i++) { |
73 | 60 | T[i+ld] = PetscSqrtReal((1.0-T[k]*T[k])/(1.0+T[i]*T[i]/(D[i]*D[i])))*0.5*(1.0/k); /* upper diagonal of matrix A */ | |
74 | 60 | T[i+2*ld] = -T[i+ld]*T[i]/D[i]; /* upper diagonal of matrix B */ | |
75 | } | ||
76 | 30 | aux = 1.0-T[k]*T[k]; | |
77 |
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90 | for (i=l;i<k;i++) aux -= T[i+ld]*T[i+ld]+T[i+2*ld]*T[i+2*ld]; |
78 | 30 | D[k] = PetscSqrtReal(aux); | |
79 |
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220 | for (i=k;i<n-1;i++) { |
80 | 190 | T[i+ld] = PetscSqrtReal((1.0-T[i+1]*T[i+1])/(1.0+T[i]*T[i]/(D[i]*D[i])))*0.5; /* upper diagonal of matrix A */ | |
81 | 190 | T[i+2*ld] = -T[i+ld]*T[i]/D[i]; /* upper diagonal of matrix B */ | |
82 | 190 | D[i+1] = PetscSqrtReal(1.0-T[i+1]*T[i+1]-T[ld+i]*T[ld+i]-T[2*ld+i]*T[2*ld+i]); /* diagonal of matrix B */ | |
83 | } | ||
84 |
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30 | if (extrarow) { T[n-1+ld]=-1.0; T[n-1+2*ld]=1.0; } |
85 | /* Fill locked eigenvalues */ | ||
86 |
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30 | PetscCall(PetscMalloc1(n,&w)); |
87 |
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50 | for (i=0;i<l;i++) w[i] = T[i]/D[i]; |
88 |
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30 | PetscCall(DSRestoreArrayReal(ds,DS_MAT_T,&T)); |
89 |
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30 | PetscCall(DSRestoreArrayReal(ds,DS_MAT_D,&D)); |
90 |
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30 | if (l==0 && k==0) PetscCall(DSSetState(ds,DS_STATE_INTERMEDIATE)); |
91 |
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20 | else PetscCall(DSSetState(ds,DS_STATE_RAW)); |
92 |
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30 | if (verbose) { |
93 | ✗ | PetscCall(PetscViewerPushFormat(viewer,PETSC_VIEWER_ASCII_MATLAB)); | |
94 | ✗ | PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Initial - - - - - - - - -\n")); | |
95 | ✗ | PetscCall(DSView(ds,viewer)); | |
96 | } | ||
97 | |||
98 | /* Condition number */ | ||
99 |
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30 | PetscCall(DSCond(ds,&cond)); |
100 |
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30 | PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Condition number = %.3f\n",(double)cond)); |
101 | |||
102 | /* Solve */ | ||
103 |
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30 | PetscCall(DSGetSlepcSC(ds,&sc)); |
104 | 30 | sc->comparison = SlepcCompareLargestReal; | |
105 | 30 | sc->comparisonctx = NULL; | |
106 | 30 | sc->map = NULL; | |
107 | 30 | sc->mapobj = NULL; | |
108 |
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30 | PetscCall(DSSolve(ds,w,NULL)); |
109 |
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30 | PetscCall(DSSort(ds,w,NULL,NULL,NULL,NULL)); |
110 |
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30 | if (extrarow) PetscCall(DSUpdateExtraRow(ds)); |
111 |
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30 | PetscCall(DSSynchronize(ds,w,NULL)); |
112 |
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30 | if (verbose) { |
113 | ✗ | PetscCall(PetscPrintf(PETSC_COMM_WORLD,"After solve - - - - - - - - -\n")); | |
114 | ✗ | PetscCall(DSView(ds,viewer)); | |
115 | } | ||
116 | |||
117 | /* Print singular values */ | ||
118 |
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30 | PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Computed singular values =\n")); |
119 |
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330 | for (i=0;i<n;i++) { |
120 | 300 | sigma = PetscRealPart(w[i]); | |
121 |
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300 | PetscCall(PetscViewerASCIIPrintf(viewer," %.5f\n",(double)sigma)); |
122 | } | ||
123 | |||
124 |
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30 | if (extrarow) { |
125 | /* Check that extra row is correct */ | ||
126 |
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10 | PetscCall(DSGetArrayReal(ds,DS_MAT_T,&T)); |
127 |
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10 | PetscCall(DSGetArray(ds,DS_MAT_U,&U)); |
128 |
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10 | PetscCall(DSGetArray(ds,DS_MAT_V,&V)); |
129 | d = 0.0; | ||
130 |
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110 | for (i=0;i<n;i++) d += T[i+ld]+U[n-1+i*ld]; |
131 |
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10 | if (PetscAbsScalar(d)>10*PETSC_MACHINE_EPSILON) PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Warning: there is a mismatch in A's extra row of %g\n",(double)PetscAbsScalar(d))); |
132 | 10 | d = 0.0; | |
133 |
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110 | for (i=0;i<n;i++) d += T[i+2*ld]-V[n-1+i*ld]; |
134 |
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10 | if (PetscAbsScalar(d)>10*PETSC_MACHINE_EPSILON) PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Warning: there is a mismatch in B's extra row of %g\n",(double)PetscAbsScalar(d))); |
135 |
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10 | PetscCall(DSRestoreArrayReal(ds,DS_MAT_T,&T)); |
136 |
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10 | PetscCall(DSRestoreArray(ds,DS_MAT_U,&U)); |
137 |
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10 | PetscCall(DSRestoreArray(ds,DS_MAT_V,&V)); |
138 | } | ||
139 | |||
140 | /* Singular vectors */ | ||
141 |
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30 | PetscCall(DSVectors(ds,DS_MAT_X,NULL,NULL)); /* all singular vectors */ |
142 |
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30 | PetscCall(DSGetMat(ds,DS_MAT_X,&X)); |
143 |
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30 | PetscCall(MatCreateVecs(X,NULL,&x0)); |
144 |
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30 | PetscCall(MatGetColumnVector(X,x0,0)); |
145 |
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30 | PetscCall(VecNorm(x0,NORM_2,&rnorm)); |
146 |
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30 | PetscCall(DSRestoreMat(ds,DS_MAT_X,&X)); |
147 |
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30 | PetscCall(VecDestroy(&x0)); |
148 |
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30 | PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Norm of 1st X vector = %.3f\n",(double)rnorm)); |
149 | |||
150 |
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30 | PetscCall(DSGetMat(ds,DS_MAT_U,&X)); |
151 |
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30 | PetscCall(MatCreateVecs(X,NULL,&x0)); |
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30 | PetscCall(MatGetColumnVector(X,x0,0)); |
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30 | PetscCall(VecNorm(x0,NORM_2,&rnorm)); |
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30 | PetscCall(DSRestoreMat(ds,DS_MAT_U,&X)); |
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30 | PetscCall(VecDestroy(&x0)); |
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30 | if (PetscAbs(rnorm-1.0)>10*PETSC_MACHINE_EPSILON) PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Warning: the 1st U vector has norm %g\n",(double)rnorm)); |
157 | |||
158 |
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30 | PetscCall(DSGetMat(ds,DS_MAT_V,&X)); |
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30 | PetscCall(MatCreateVecs(X,NULL,&x0)); |
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30 | PetscCall(MatGetColumnVector(X,x0,0)); |
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30 | PetscCall(VecNorm(x0,NORM_2,&rnorm)); |
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30 | PetscCall(DSRestoreMat(ds,DS_MAT_V,&X)); |
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30 | PetscCall(VecDestroy(&x0)); |
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30 | if (PetscAbs(rnorm-1.0)>10*PETSC_MACHINE_EPSILON) PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Warning: the 1st V vector has norm %g\n",(double)rnorm)); |
165 | |||
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30 | PetscCall(PetscFree(w)); |
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30 | PetscCall(DSDestroy(&ds)); |
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30 | PetscCall(SlepcFinalize()); |
169 | return 0; | ||
170 | } | ||
171 | |||
172 | /*TEST | ||
173 | |||
174 | testset: | ||
175 | requires: double | ||
176 | test: | ||
177 | suffix: 1 | ||
178 | args: -test_dsview | ||
179 | test: | ||
180 | suffix: 2 | ||
181 | args: -l 1 -k 4 | ||
182 | test: | ||
183 | suffix: 2_extrarow | ||
184 | filter: sed -e "s/extrarow//" | ||
185 | args: -l 1 -k 4 -extrarow | ||
186 | output_file: output/test22_2.out | ||
187 | |||
188 | TEST*/ | ||
189 |