ROL
test_06.cpp
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43 
48 #define USE_HESSVEC 0
49 
50 #include "ROL_TestObjectives.hpp"
51 #include "ROL_Algorithm.hpp"
52 #include "Teuchos_oblackholestream.hpp"
53 #include "Teuchos_GlobalMPISession.hpp"
54 #include "Teuchos_XMLParameterListHelpers.hpp"
55 
56 #include <iostream>
57 
58 typedef double RealT;
59 
60 int main(int argc, char *argv[]) {
61 
62  Teuchos::GlobalMPISession mpiSession(&argc, &argv);
63 
64  // This little trick lets us print to std::cout only if a (dummy) command-line argument is provided.
65  int iprint = argc - 1;
66  Teuchos::RCP<std::ostream> outStream;
67  Teuchos::oblackholestream bhs; // outputs nothing
68  if (iprint > 0)
69  outStream = Teuchos::rcp(&std::cout, false);
70  else
71  outStream = Teuchos::rcp(&bhs, false);
72 
73  int errorFlag = 0;
74 
75  // *** Test body.
76 
77  try {
78 
79  std::string filename = "input.xml";
80  Teuchos::RCP<Teuchos::ParameterList> parlist = Teuchos::rcp( new Teuchos::ParameterList() );
81  Teuchos::updateParametersFromXmlFile( filename, parlist.ptr() );
82  parlist->sublist("General").set("Inexact Hessian-Times-A-Vector",true);
83 #if USE_HESSVEC
84  parlist->sublist("General").set("Inexact Hessian-Times-A-Vector",false);
85 #endif
86 
87  *outStream << "\n\n" << ROL::ETestObjectivesToString(ROL::TESTOBJECTIVES_ROSENBROCK) << "\n\n";
88 
89  // Set Up Optimization Problem
90  Teuchos::RCP<ROL::Vector<RealT> > x0, z;
91  Teuchos::RCP<ROL::Objective<RealT> > obj;
92  ROL::getTestObjectives<RealT>(obj,x0,z,ROL::TESTOBJECTIVES_ROSENBROCK);
93  Teuchos::RCP<ROL::Vector<RealT> > x = x0->clone();
94 
95  // Get Dimension of Problem
96  int dim = x0->dimension();
97  parlist->sublist("General").sublist("Krylov").set("Iteration Limit", 2*dim);
98 
99  // Error Vector
100  Teuchos::RCP<ROL::Vector<RealT> > e = x->clone();
101  e->zero();
102 
103  for ( ROL::EDescent desc = ROL::DESCENT_STEEPEST; desc < ROL::DESCENT_LAST; desc++ ) {
104  parlist->sublist("Step").sublist("Line Search").sublist("Descent Method").set("Type", ROL::EDescentToString(desc));
105  *outStream << std::endl << std::endl << ROL::EDescentToString(desc) << std::endl << std::endl;
107  // Define Step
108  parlist->sublist("Step").sublist("Line Search").sublist("Line-Search Method").set("Type",ROL::ELineSearchToString(ls));
109 
110  // Define Algorithm
111  ROL::Algorithm<RealT> algo("Line Search",*parlist,false);
112 
113  // Run Algorithm
114  x->set(*x0);
115  algo.run(*x, *obj, true, *outStream);
116 
117  // Compute Error
118  e->set(*x);
119  e->axpy(-1.0,*z);
120  *outStream << std::endl << "Norm of Error: " << e->norm() << std::endl;
121  //errorFlag += (int)(e.norm() < std::sqrt(ROL::ROL_EPSILON));
122  }
123  }
124  }
125  catch (std::logic_error err) {
126  *outStream << err.what() << std::endl;
127  errorFlag = -1000;
128  }; // end try
129 
130  if (errorFlag != 0)
131  std::cout << "End Result: TEST FAILED" << std::endl;
132  else
133  std::cout << "End Result: TEST PASSED" << std::endl;
134 
135  return 0;
136 
137 }
138 
Contains definitions of test objective functions.
ELineSearch
Enumeration of line-search types.
Definition: ROL_Types.hpp:625
std::string EDescentToString(EDescent tr)
Definition: ROL_Types.hpp:321
double RealT
Definition: test_06.cpp:58
Provides an interface to run optimization algorithms.
std::string ELineSearchToString(ELineSearch ls)
Definition: ROL_Types.hpp:637
std::string ETestObjectivesToString(ETestObjectives to)
Definition: ROL_Types.hpp:872
virtual std::vector< std::string > run(Vector< Real > &x, Objective< Real > &obj, bool print=false, std::ostream &outStream=std::cout)
Run algorithm on unconstrained problems (Type-U). This is the primary Type-U interface.
int main(int argc, char *argv[])
Definition: test_06.cpp:60
EDescent
Enumeration of descent direction types.
Definition: ROL_Types.hpp:312