Actual source code: test5.c
slepc-3.17.2 2022-08-09
1: /*
2: - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
3: SLEPc - Scalable Library for Eigenvalue Problem Computations
4: Copyright (c) 2002-, Universitat Politecnica de Valencia, Spain
6: This file is part of SLEPc.
7: SLEPc is distributed under a 2-clause BSD license (see LICENSE).
8: - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
9: */
11: static char help[] = "Test PEP view and monitor functionality.\n\n";
13: #include <slepcpep.h>
15: int main(int argc,char **argv)
16: {
17: Mat A[3];
18: PEP pep;
19: Vec xr,xi;
20: PetscScalar kr,ki;
21: PetscInt n=6,Istart,Iend,i,nconv,its;
22: PetscReal errest;
23: PetscBool checkfile;
24: char filename[PETSC_MAX_PATH_LEN];
25: PetscViewer viewer;
27: SlepcInitialize(&argc,&argv,(char*)0,help);
28: PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL);
29: PetscPrintf(PETSC_COMM_WORLD,"\nPEP of diagonal problem, n=%" PetscInt_FMT "\n\n",n);
31: /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
32: Generate the matrices
33: - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
34: MatCreate(PETSC_COMM_WORLD,&A[0]);
35: MatSetSizes(A[0],PETSC_DECIDE,PETSC_DECIDE,n,n);
36: MatSetFromOptions(A[0]);
37: MatSetUp(A[0]);
38: MatGetOwnershipRange(A[0],&Istart,&Iend);
39: for (i=Istart;i<Iend;i++) MatSetValue(A[0],i,i,i+1,INSERT_VALUES);
40: MatAssemblyBegin(A[0],MAT_FINAL_ASSEMBLY);
41: MatAssemblyEnd(A[0],MAT_FINAL_ASSEMBLY);
43: MatCreate(PETSC_COMM_WORLD,&A[1]);
44: MatSetSizes(A[1],PETSC_DECIDE,PETSC_DECIDE,n,n);
45: MatSetFromOptions(A[1]);
46: MatSetUp(A[1]);
47: for (i=Istart;i<Iend;i++) MatSetValue(A[1],i,i,-1.5,INSERT_VALUES);
48: MatAssemblyBegin(A[1],MAT_FINAL_ASSEMBLY);
49: MatAssemblyEnd(A[1],MAT_FINAL_ASSEMBLY);
51: MatCreate(PETSC_COMM_WORLD,&A[2]);
52: MatSetSizes(A[2],PETSC_DECIDE,PETSC_DECIDE,n,n);
53: MatSetFromOptions(A[2]);
54: MatSetUp(A[2]);
55: for (i=Istart;i<Iend;i++) MatSetValue(A[2],i,i,-1.0/(i+1),INSERT_VALUES);
56: MatAssemblyBegin(A[2],MAT_FINAL_ASSEMBLY);
57: MatAssemblyEnd(A[2],MAT_FINAL_ASSEMBLY);
59: /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
60: Create the PEP solver
61: - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
62: PEPCreate(PETSC_COMM_WORLD,&pep);
63: PetscObjectSetName((PetscObject)pep,"pep");
64: PEPSetOperators(pep,3,A);
65: PEPSetFromOptions(pep);
67: /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
68: Solve the eigensystem and display solution
69: - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
70: PEPSolve(pep);
71: PEPGetConverged(pep,&nconv);
72: PEPGetIterationNumber(pep,&its);
73: PetscPrintf(PETSC_COMM_WORLD," %" PetscInt_FMT " converged eigenpairs after %" PetscInt_FMT " iterations\n",nconv,its);
74: if (nconv>0) {
75: MatCreateVecs(A[0],&xr,&xi);
76: PEPGetEigenpair(pep,0,&kr,&ki,xr,xi);
77: VecDestroy(&xr);
78: VecDestroy(&xi);
79: PEPGetErrorEstimate(pep,0,&errest);
80: }
81: PEPErrorView(pep,PEP_ERROR_RELATIVE,NULL);
83: /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
84: Check file containing the eigenvalues
85: - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
86: PetscOptionsGetString(NULL,NULL,"-checkfile",filename,sizeof(filename),&checkfile);
87: if (checkfile) {
88: #if defined(PETSC_HAVE_COMPLEX)
89: PetscComplex *eigs,eval;
90: PetscMalloc1(nconv,&eigs);
91: PetscViewerBinaryOpen(PETSC_COMM_WORLD,filename,FILE_MODE_READ,&viewer);
92: PetscViewerBinaryRead(viewer,eigs,nconv,NULL,PETSC_COMPLEX);
93: PetscViewerDestroy(&viewer);
94: for (i=0;i<nconv;i++) {
95: PEPGetEigenpair(pep,i,&kr,&ki,NULL,NULL);
96: #if defined(PETSC_USE_COMPLEX)
97: eval = kr;
98: #else
99: eval = PetscCMPLX(kr,ki);
100: #endif
102: }
103: PetscFree(eigs);
104: #else
105: SETERRQ(PETSC_COMM_WORLD,PETSC_ERR_SUP,"The -checkfile option requires C99 complex numbers");
106: #endif
107: }
109: PEPDestroy(&pep);
110: MatDestroy(&A[0]);
111: MatDestroy(&A[1]);
112: MatDestroy(&A[2]);
113: SlepcFinalize();
114: return 0;
115: }
117: /*TEST
119: test:
120: suffix: 1
121: args: -pep_error_backward ::ascii_info_detail -pep_largest_real -pep_view_values -pep_monitor_conv -pep_error_absolute ::ascii_matlab -pep_monitor_all -pep_converged_reason -pep_view
122: requires: !single
123: filter: grep -v "tolerance" | grep -v "problem type" | sed -e "s/[+-]0\.0*i//g" -e "s/\([0-9]\.[5]*\)[+-][0-9]\.[0-9]*e-[0-9]*i/\\1/g" -e "s/[0-9]\.[0-9]*e-\([0-9]*\)/removed/g"
125: test:
126: suffix: 2
127: args: -n 12 -pep_largest_real -pep_monitor -pep_view_values ::ascii_matlab
128: requires: double
129: filter: sed -e "s/[+-][0-9]\.[0-9]*e-[0-9]*i//" -e "s/[0-9]\.[0-9]*e-\([0-9]*\)/removed/g" -e "s/5\.\([49]\)999999[0-9]*e+00/5.\\1999999999999999e+00/"
131: test:
132: suffix: 3
133: args: -pep_nev 4 -pep_view_values binary:myvalues.bin -checkfile myvalues.bin
134: requires: double c99_complex
136: test:
137: suffix: 4
138: args: -pep_nev 4 -pep_ncv 10 -pep_refine -pep_conv_norm -pep_extract none -pep_scale scalar -pep_view -pep_monitor -pep_error_relative ::ascii_info_detail
139: requires: double !complex
140: filter: grep -v "tolerance" | sed -e "s/[0-9]\.[0-9]*e-\([0-9]*\)/removed/g"
142: test:
143: suffix: 5
144: args: -n 12 -pep_largest_real -pep_monitor draw::draw_lg -pep_monitor_all draw::draw_lg -pep_view_values draw -draw_save myeigen.ppm -draw_virtual
145: requires: x double
147: TEST*/