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/*
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SLEPc - Scalable Library for Eigenvalue Problem Computations
Copyright (c) 2002-, Universitat Politecnica de Valencia, Spain
This file is part of SLEPc.
SLEPc is distributed under a 2-clause BSD license (see LICENSE).
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*/
static char help[] = "Test EPS view and monitor functionality.\n\n";
#include <slepceps.h>
int main(int argc,char **argv)
{
Mat A;
EPS eps;
PetscInt n=6,Istart,Iend,i;
PetscFunctionBeginUser;
PetscCall(SlepcInitialize(&argc,&argv,NULL,help));
PetscCall(PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL));
PetscCall(PetscPrintf(PETSC_COMM_WORLD,"\nEPS of diagonal problem, n=%" PetscInt_FMT "\n\n",n));
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Generate the matrix
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PetscCall(MatCreate(PETSC_COMM_WORLD,&A));
PetscCall(MatSetSizes(A,PETSC_DECIDE,PETSC_DECIDE,n,n));
PetscCall(MatSetFromOptions(A));
PetscCall(MatGetOwnershipRange(A,&Istart,&Iend));
for (i=Istart;i<Iend;i++) PetscCall(MatSetValue(A,i,i,i+1,INSERT_VALUES));
PetscCall(MatAssemblyBegin(A,MAT_FINAL_ASSEMBLY));
PetscCall(MatAssemblyEnd(A,MAT_FINAL_ASSEMBLY));
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Create the EPS solver
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PetscCall(EPSCreate(PETSC_COMM_WORLD,&eps));
PetscCall(PetscObjectSetName((PetscObject)eps,"eps"));
PetscCall(EPSSetOperators(eps,A,NULL));
PetscCall(EPSSetFromOptions(eps));
/* - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Solve the eigensystem and display solution
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PetscCall(EPSSolve(eps));
PetscCall(EPSErrorView(eps,EPS_ERROR_RELATIVE,NULL));
PetscCall(EPSDestroy(&eps));
PetscCall(MatDestroy(&A));
PetscCall(SlepcFinalize());
return 0;
}
/*TEST
test:
suffix: 1
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
requires: !single
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"
test:
suffix: 2
args: -n 20 -eps_largest_real -eps_monitor -eps_view_values ::ascii_matlab
requires: double
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/"
test:
suffix: 3
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 -nox
requires: x double
TEST*/
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