Actual source code: test23.c
slepc-3.20.2 2024-03-15
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 EPS view and monitor functionality.\n\n";
13: #include <slepceps.h>
15: int main(int argc,char **argv)
16: {
17: Mat A;
18: EPS eps;
19: PetscInt n=6,Istart,Iend,i;
21: PetscFunctionBeginUser;
22: PetscCall(SlepcInitialize(&argc,&argv,(char*)0,help));
23: PetscCall(PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL));
24: PetscCall(PetscPrintf(PETSC_COMM_WORLD,"\nEPS of diagonal problem, n=%" PetscInt_FMT "\n\n",n));
26: /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
27: Generate the matrix
28: - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
29: PetscCall(MatCreate(PETSC_COMM_WORLD,&A));
30: PetscCall(MatSetSizes(A,PETSC_DECIDE,PETSC_DECIDE,n,n));
31: PetscCall(MatSetFromOptions(A));
32: PetscCall(MatSetUp(A));
33: PetscCall(MatGetOwnershipRange(A,&Istart,&Iend));
34: for (i=Istart;i<Iend;i++) PetscCall(MatSetValue(A,i,i,i+1,INSERT_VALUES));
35: PetscCall(MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY));
36: PetscCall(MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY));
38: /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
39: Create the EPS solver
40: - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
41: PetscCall(EPSCreate(PETSC_COMM_WORLD,&eps));
42: PetscCall(PetscObjectSetName((PetscObject)eps,"eps"));
43: PetscCall(EPSSetOperators(eps,A,NULL));
44: PetscCall(EPSSetFromOptions(eps));
46: /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
47: Solve the eigensystem and display solution
48: - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
49: PetscCall(EPSSolve(eps));
50: PetscCall(EPSErrorView(eps,EPS_ERROR_RELATIVE,NULL));
51: PetscCall(EPSDestroy(&eps));
52: PetscCall(MatDestroy(&A));
53: PetscCall(SlepcFinalize());
54: return 0;
55: }
57: /*TEST
59: test:
60: suffix: 1
61: args: -eps_error_backward ::ascii_info_detail -eps_largest_real -eps_balance oneside -eps_view_values -eps_monitor_conv -eps_error_absolute ::ascii_matlab -eps_monitor_all -eps_converged_reason -eps_view
62: requires: !single
63: filter: grep -v "tolerance" | sed -e "s/hermitian/symmetric/" -e "s/[+-]0\.0*i//g" -e "s/\([1-6]\.\)[+-][0-9]\.[0-9]*e-[0-9]*i/\\1/g" -e "s/[0-9]\.[0-9]*e-\([0-9]*\)/removed/g"
65: test:
66: suffix: 2
67: args: -n 20 -eps_largest_real -eps_monitor -eps_view_values ::ascii_matlab
68: requires: double
69: 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/2\.[0-9]*e+01/2.0000000000000000e+01/" -e "s/1\.9999999999[0-9]*e+01/2.0000000000000000e+01/"
71: test:
72: suffix: 3
73: args: -n 20 -eps_largest_real -eps_monitor draw::draw_lg -eps_monitor_all draw::draw_lg -eps_view_values draw -draw_save myeigen.ppm -draw_virtual
74: requires: x double
76: TEST*/