Actual source code: test23.c

slepc-3.17.2 2022-08-09
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  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:   SlepcInitialize(&argc,&argv,(char*)0,help);
 22:   PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL);
 23:   PetscPrintf(PETSC_COMM_WORLD,"\nEPS of diagonal problem, n=%" PetscInt_FMT "\n\n",n);

 25:   /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 26:         Generate the matrix
 27:      - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
 28:   MatCreate(PETSC_COMM_WORLD,&A);
 29:   MatSetSizes(A,PETSC_DECIDE,PETSC_DECIDE,n,n);
 30:   MatSetFromOptions(A);
 31:   MatSetUp(A);
 32:   MatGetOwnershipRange(A,&Istart,&Iend);
 33:   for (i=Istart;i<Iend;i++) MatSetValue(A,i,i,i+1,INSERT_VALUES);
 34:   MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY);
 35:   MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY);

 37:   /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 38:                      Create the EPS solver
 39:      - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
 40:   EPSCreate(PETSC_COMM_WORLD,&eps);
 41:   PetscObjectSetName((PetscObject)eps,"eps");
 42:   EPSSetOperators(eps,A,NULL);
 43:   EPSSetFromOptions(eps);

 45:   /* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
 46:                 Solve the eigensystem and display solution
 47:      - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
 48:   EPSSolve(eps);
 49:   EPSErrorView(eps,EPS_ERROR_RELATIVE,NULL);
 50:   EPSDestroy(&eps);
 51:   MatDestroy(&A);
 52:   SlepcFinalize();
 53:   return 0;
 54: }

 56: /*TEST

 58:    test:
 59:       suffix: 1
 60:       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
 61:       requires: !single
 62:       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"

 64:    test:
 65:       suffix: 2
 66:       args: -n 20 -eps_largest_real -eps_monitor -eps_view_values ::ascii_matlab
 67:       requires: double
 68:       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/"

 70:    test:
 71:       suffix: 3
 72:       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
 73:       requires: x double

 75: TEST*/