ROL
function/test_12.cpp
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43
51#include "ROL_StdVector.hpp"
52#include "ROL_RandomVector.hpp"
53#include "ROL_Stream.hpp"
54#include "Teuchos_GlobalMPISession.hpp"
55
56template<class Real>
57void printVector( const ROL::Vector<Real> &x, std::ostream &outStream ) {
58
59 ROL::Ptr<const std::vector<Real> > xp =
60 dynamic_cast<const ROL::StdVector<Real>&>(x).getVector();
61
62 outStream << "Standard Vector" << std::endl;
63 for( size_t i=0; i<xp->size(); ++i ) {
64 outStream << (*xp)[i] << std::endl;
65 }
66}
67
68
69
70typedef double RealT;
71
72int main(int argc, char *argv[]) {
73
74 typedef ROL::Vector<RealT> V;
75 typedef ROL::StdVector<RealT> SV;
76
77
78
79 Teuchos::GlobalMPISession mpiSession(&argc, &argv);
80
81 // This little trick lets us print to std::cout only if a (dummy) command-line argument is provided.
82 int iprint = argc - 1;
83 ROL::Ptr<std::ostream> outStream;
84 ROL::nullstream bhs; // outputs nothing
85 if (iprint > 0)
86 outStream = ROL::makePtrFromRef(std::cout);
87 else
88 outStream = ROL::makePtrFromRef(bhs);
89
90 int errorFlag = 0;
91
92 try {
93
94 int dim = 10;
95
96 RealT tol = std::sqrt(ROL::ROL_EPSILON<RealT>());
97
98 ROL::Ptr<V> v = ROL::makePtr<SV>( ROL::makePtr<std::vector<RealT>>(dim) );
99 ROL::Ptr<V> Hv = v->clone();
100 ROL::Ptr<V> HHv = v->clone();
101
102 ROL::Ptr<V> e0 = v->basis(0);
103
104 RandomizeVector(*v);
105
107
108 // Reflect v about a vector to the x direction
109 // Verify that the result is parallel to x
110
111 printVector(*v,*outStream);
112
113 H.apply(*Hv, *v, tol);
114
115 printVector(*Hv,*outStream);
116
117 H.apply(*HHv, *Hv, tol);
118
119 printVector(*HHv,*outStream);
120
121 }
122
123 catch (std::logic_error& err) {
124 *outStream << err.what() << "\n";
125 errorFlag = -1000;
126 }; // end try
127
128 if (errorFlag != 0)
129 std::cout << "End Result: TEST FAILED\n";
130 else
131 std::cout << "End Result: TEST PASSED\n";
132
133 return 0;
134}
135
136
Vector< Real > V
Defines a no-output stream class ROL::NullStream and a function makeStreamPtr which either wraps a re...
Provides the interface to create a Householder reflector operator, that when applied to a vector x,...
void apply(Vector< Real > &Hv, const Vector< Real > &v, Real &tol) const
Apply linear operator.
Provides the ROL::Vector interface for scalar values, to be used, for example, with scalar constraint...
Defines the linear algebra or vector space interface.
int main(int argc, char *argv[])
void printVector(const ROL::Vector< Real > &x, std::ostream &outStream)
double RealT
constexpr auto dim