Actual source code: test5.c

slepc-3.11.2 2019-07-30
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  1: /*
  2:    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
  3:    SLEPc - Scalable Library for Eigenvalue Problem Computations
  4:    Copyright (c) 2002-2019, 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:   PetscInt       n=6,Istart,Iend,i;

 22:   SlepcInitialize(&argc,&argv,(char*)0,help);if (ierr) return ierr;
 23:   PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL);
 24:   PetscPrintf(PETSC_COMM_WORLD,"\nPEP of diagonal problem, n=%D\n\n",n);

 26:   /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 27:         Generate the matrices
 28:      - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
 29:   MatCreate(PETSC_COMM_WORLD,&A[0]);
 30:   MatSetSizes(A[0],PETSC_DECIDE,PETSC_DECIDE,n,n);
 31:   MatSetFromOptions(A[0]);
 32:   MatSetUp(A[0]);
 33:   MatGetOwnershipRange(A[0],&Istart,&Iend);
 34:   for (i=Istart;i<Iend;i++) {
 35:     MatSetValue(A[0],i,i,i+1,INSERT_VALUES);
 36:   }
 37:   MatAssemblyBegin(A[0],MAT_FINAL_ASSEMBLY);
 38:   MatAssemblyEnd(A[0],MAT_FINAL_ASSEMBLY);

 40:   MatCreate(PETSC_COMM_WORLD,&A[1]);
 41:   MatSetSizes(A[1],PETSC_DECIDE,PETSC_DECIDE,n,n);
 42:   MatSetFromOptions(A[1]);
 43:   MatSetUp(A[1]);
 44:   for (i=Istart;i<Iend;i++) {
 45:     MatSetValue(A[1],i,i,-1.5,INSERT_VALUES);
 46:   }
 47:   MatAssemblyBegin(A[1],MAT_FINAL_ASSEMBLY);
 48:   MatAssemblyEnd(A[1],MAT_FINAL_ASSEMBLY);

 50:   MatCreate(PETSC_COMM_WORLD,&A[2]);
 51:   MatSetSizes(A[2],PETSC_DECIDE,PETSC_DECIDE,n,n);
 52:   MatSetFromOptions(A[2]);
 53:   MatSetUp(A[2]);
 54:   for (i=Istart;i<Iend;i++) {
 55:     MatSetValue(A[2],i,i,-1.0/(i+1),INSERT_VALUES);
 56:   }
 57:   MatAssemblyBegin(A[2],MAT_FINAL_ASSEMBLY);
 58:   MatAssemblyEnd(A[2],MAT_FINAL_ASSEMBLY);

 60:   /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 61:                      Create the PEP solver
 62:      - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
 63:   PEPCreate(PETSC_COMM_WORLD,&pep);
 64:   PetscObjectSetName((PetscObject)pep,"pep");
 65:   PEPSetOperators(pep,3,A);
 66:   PEPSetFromOptions(pep);

 68:   /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 69:                 Solve the eigensystem and display solution
 70:      - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
 71:   PEPSolve(pep);
 72:   PEPErrorView(pep,PEP_ERROR_RELATIVE,NULL);
 73:   PEPDestroy(&pep);
 74:   MatDestroy(&A[0]);
 75:   MatDestroy(&A[1]);
 76:   MatDestroy(&A[2]);
 77:   SlepcFinalize();
 78:   return ierr;
 79: }

 81: /*TEST

 83:    test:
 84:       suffix: 1
 85:       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
 86:       requires: !complex !single
 87:       filter: grep -v "tolerance" | grep -v "problem type" | sed -e "s/[0-9]\.[0-9]*e-\([0-9]*\)/removed/g"

 89: TEST*/