ROL
step/test_13.cpp
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43 
48 #include "ROL_GetTestProblems.hpp"
50 #include "ROL_Stream.hpp"
51 #include "Teuchos_GlobalMPISession.hpp"
52 
53 
54 #include <iostream>
55 
56 typedef double RealT;
57 
58 int main(int argc, char *argv[]) {
59 
60  Teuchos::GlobalMPISession mpiSession(&argc, &argv);
61 
62  // This little trick lets us print to std::cout only if a (dummy) command-line argument is provided.
63  int iprint = argc - 1;
64  ROL::Ptr<std::ostream> outStream;
65  ROL::nullstream bhs; // outputs nothing
66  if (iprint > 0)
67  outStream = ROL::makePtrFromRef(std::cout);
68  else
69  outStream = ROL::makePtrFromRef(bhs);
70 
71  int errorFlag = 0;
72 
73  // *** Test body.
74 
75  try {
76  std::string filename = "input.xml";
77 
78  auto parlist = ROL::getParametersFromXmlFile( filename );
79 
80  // Setup optimization problem
81  ROL::Ptr<ROL::Vector<RealT> > x0;
82  std::vector<ROL::Ptr<ROL::Vector<RealT> > > z;
83  ROL::Ptr<ROL::OptimizationProblem<RealT> > optProblem;
84  ROL::GetTestProblem<RealT>(optProblem,x0,z,ROL::TESTOPTPROBLEM_HS1);
85 
86  // Get Dimension of Problem
87  int dim = x0->dimension();
88  parlist->sublist("General").sublist("Krylov").set("Iteration Limit", 2*dim);
89 
90  // Check Derivatives
91  optProblem->check(*outStream);
92 
93  // Error Vector
94  ROL::Ptr<ROL::Vector<RealT> > e = x0->clone();
95  e->zero();
96 
97  // Setup optimization solver
98  parlist->sublist("Status Test").set("Gradient Tolerance",static_cast<RealT>(1e-6));
99  parlist->sublist("Step").set("Type", "Interior Point");
100  ROL::OptimizationSolver<RealT> optSolver(*optProblem,*parlist);
101  optSolver.solve(*outStream);
102 
103  // Compute Error
104  RealT err(0);
105  for (int i = 0; i < static_cast<int>(z.size()); ++i) {
106  e->set(*x0);
107  e->axpy(-1.0,*z[i]);
108  if (i == 0) {
109  err = e->norm();
110  }
111  else {
112  err = std::min(err,e->norm());
113  }
114  }
115  *outStream << std::endl << "Norm of Error: " << err << std::endl;
116 
117  RealT tol = static_cast<RealT>(1e-3)*std::max(z[0]->norm(),static_cast<RealT>(1));
118  errorFlag += ((err < tol) ? 0 : 1);
119  }
120  catch (std::logic_error err) {
121  *outStream << err.what() << std::endl;
122  errorFlag = -1000;
123  }; // end try
124 
125  if (errorFlag != 0)
126  std::cout << "End Result: TEST FAILED" << std::endl;
127  else
128  std::cout << "End Result: TEST PASSED" << std::endl;
129 
130  return 0;
131 
132 }
Contains definitions of test objective functions.
Defines a no-output stream class ROL::NullStream and a function makeStreamPtr which either wraps a re...
Provides a simplified interface for solving a wide range of optimization problems.
basic_nullstream< char, char_traits< char >> nullstream
Definition: ROL_Stream.hpp:72
int main(int argc, char *argv[])
int solve(const ROL::Ptr< StatusTest< Real > > &status=ROL::nullPtr, const bool combineStatus=true)
Solve optimization problem with no iteration output.