ROL
step/test_06.cpp
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43
48#define USE_HESSVEC 0
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("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 parlist->sublist("Step").set("Type","Line Search");
87
88 *outStream << "\n\n" << ROL::ETestOptProblemToString(ROL::TESTOPTPROBLEM_ROSENBROCK) << "\n\n";
89
90 for ( ROL::EDescent desc = ROL::DESCENT_STEEPEST; desc < ROL::DESCENT_LAST; desc++ ) {
91 parlist->sublist("Step").sublist("Line Search").sublist("Descent Method").set("Type", ROL::EDescentToString(desc));
92 *outStream << std::endl << std::endl << ROL::EDescentToString(desc) << std::endl << std::endl;
94 // Set Up Optimization Problem
95 ROL::Ptr<ROL::Vector<RealT> > x0;
96 std::vector<ROL::Ptr<ROL::Vector<RealT> > > z;
97 ROL::Ptr<ROL::OptimizationProblem<RealT> > problem;
98 ROL::GetTestProblem<RealT>(problem,x0,z,ROL::TESTOPTPROBLEM_ROSENBROCK);
99
100 // Get Dimension of Problem
101 int dim = x0->dimension();
102 parlist->sublist("General").sublist("Krylov").set("Iteration Limit", 2*dim);
103
104 // Error Vector
105 ROL::Ptr<ROL::Vector<RealT> > e = x0->clone();
106 e->zero();
107
108 // Define Step
109 parlist->sublist("Step").sublist("Line Search").sublist("Line-Search Method").set("Type",ROL::ELineSearchToString(ls));
110 // Define Solver
111 ROL::OptimizationSolver<RealT> solver(*problem,*parlist);
112
113 // Run Solver
114 solver.solve(*outStream);
115
116 // Compute Error
117 RealT err(0);
118 for (int i = 0; i < static_cast<int>(z.size()); ++i) {
119 e->set(*x0);
120 e->axpy(-1.0,*z[i]);
121 if (i == 0) {
122 err = e->norm();
123 }
124 else {
125 err = std::min(err,e->norm());
126 }
127 }
128 *outStream << std::endl << "Norm of Error: " << err << std::endl;
129 //errorFlag += (int)(e.norm() < std::sqrt(ROL::ROL_EPSILON<RealT>()));
130 }
131 }
132 }
133 catch (std::logic_error& err) {
134 *outStream << err.what() << std::endl;
135 errorFlag = -1000;
136 }; // end try
137
138 if (errorFlag != 0)
139 std::cout << "End Result: TEST FAILED" << std::endl;
140 else
141 std::cout << "End Result: TEST PASSED" << std::endl;
142
143 return 0;
144
145}
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
@ DESCENT_LAST
@ DESCENT_STEEPEST
std::string EDescentToString(EDescent tr)
ELineSearch
@ LINESEARCH_BACKTRACKING
@ LINESEARCH_USERDEFINED
std::string ELineSearchToString(ELineSearch ls)
int main(int argc, char *argv[])
double RealT
constexpr auto dim