ROL
function/test_12.cpp
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51 #include "ROL_StdVector.hpp"
52 #include "ROL_RandomVector.hpp"
53 #include "ROL_Stream.hpp"
54 #include "Teuchos_GlobalMPISession.hpp"
55 
56 template<class Real>
57 void 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 
70 typedef double RealT;
71 
72 int 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 
void RandomizeVector(Vector< Real > &x, const Real &lower=0.0, const Real &upper=1.0)
Fill a ROL::Vector with uniformly-distributed random numbers in the interval [lower,upper].
Defines the linear algebra or vector space interface.
Definition: ROL_Vector.hpp:80
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...
Vector< Real > V
void printVector(const ROL::Vector< Real > &x, std::ostream &outStream)
void apply(Vector< Real > &Hv, const Vector< Real > &v, Real &tol) const
Apply linear operator.
basic_nullstream< char, char_traits< char >> nullstream
Definition: ROL_Stream.hpp:72
int main(int argc, char *argv[])