ROL
step/test_02.cpp
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43
48#define USE_HESSVEC 1
49
52#include "ROL_Stream.hpp"
53#include "Teuchos_GlobalMPISession.hpp"
54
55
56#include <iostream>
57
58typedef double RealT;
59
60int 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 ROL::Ptr<std::ostream> outStream;
67 ROL::nullstream bhs; // outputs nothing
68 if (iprint > 0)
69 outStream = ROL::makePtrFromRef(std::cout);
70 else
71 outStream = ROL::makePtrFromRef(bhs);
72
73 int errorFlag = 0;
74
75 // *** Test body.
76
77 try {
78
79 std::string filename = "input.xml";
80
81 auto parlist = ROL::getParametersFromXmlFile( filename );
82 parlist->sublist("Step").set("Type","Trust Region");
83
84 // Loop Through Test Objectives
87 if ( tr != ROL::TRUSTREGION_LINMORE ) {
88 // Set Up Optimization Problem
89 ROL::Ptr<ROL::Vector<RealT> > x0;
90 std::vector<ROL::Ptr<ROL::Vector<RealT> > > z;
91 ROL::Ptr<ROL::OptimizationProblem<RealT> > problem;
92 ROL::GetTestProblem<RealT>(problem,x0,z,objFunc);
93
94 if (problem->getProblemType() == ROL::TYPE_U
97 && objFunc != ROL::TESTOPTPROBLEM_MINIMAX3) {
98 *outStream << std::endl << std::endl << ROL::ETestOptProblemToString(objFunc) << std::endl << std::endl;
99
100 // Get Dimension of Problem
101 int dim = x0->dimension();
102 parlist->sublist("General").sublist("Krylov").set("Iteration Limit", 5*dim);
103
104 // Error Vector
105 ROL::Ptr<ROL::Vector<RealT> > e = x0->clone();
106 e->zero();
107
108 *outStream << "\n\n" << ROL::ETrustRegionToString(tr) << "\n\n";
109 parlist->sublist("Step").sublist("Trust Region").set("Subproblem Solver", ETrustRegionToString(tr));
110
111 // Define Solver
112 ROL::OptimizationSolver<RealT> solver(*problem,*parlist);
113
114 // Run Solver
115 solver.solve(*outStream);
116
117 // Compute Error
118 RealT err(0);
119 for (int i = 0; i < static_cast<int>(z.size()); ++i) {
120 e->set(*x0);
121 e->axpy(-1.0,*z[i]);
122 if (i == 0) {
123 err = e->norm();
124 }
125 else {
126 err = std::min(err,e->norm());
127 }
128 }
129 *outStream << std::endl << "Norm of Error: " << err << std::endl;
130 }
131 }
132 }
133 }
134 }
135 catch (std::logic_error& err) {
136 *outStream << err.what() << std::endl;
137 errorFlag = -1000;
138 }; // end try
139
140 if (errorFlag != 0)
141 std::cout << "End Result: TEST FAILED" << std::endl;
142 else
143 std::cout << "End Result: TEST PASSED" << std::endl;
144
145 return 0;
146
147}
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.
int solve(const ROL::Ptr< StatusTest< Real > > &status=ROL::nullPtr, const bool combineStatus=true)
Solve optimization problem with no iteration output.
std::string ETestOptProblemToString(ETestOptProblem to)
@ TESTOPTPROBLEM_ROSENBROCK
@ TESTOPTPROBLEM_MINIMAX3
@ TESTOPTPROBLEM_MINIMAX1
@ TESTOPTPROBLEM_MINIMAX2
@ TYPE_U
Definition: ROL_Types.hpp:258
std::string ETrustRegionToString(ETrustRegion tr)
@ TRUSTREGION_CAUCHYPOINT
int main(int argc, char *argv[])
double RealT
constexpr auto dim