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NekMatrix.hpp
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1 ///////////////////////////////////////////////////////////////////////////////
2 //
3 // File: NekMatrix.hpp
4 //
5 // For more information, please see: http://www.nektar.info
6 //
7 // The MIT License
8 //
9 // Copyright (c) 2006 Division of Applied Mathematics, Brown University (USA),
10 // Department of Aeronautics, Imperial College London (UK), and Scientific
11 // Computing and Imaging Institute, University of Utah (USA).
12 //
13 // License for the specific language governing rights and limitations under
14 // Permission is hereby granted, free of charge, to any person obtaining a
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31 //
32 // Description: Generic Matrix
33 //
34 //
35 //
36 ///////////////////////////////////////////////////////////////////////////////
37 
38 #ifndef NEKTAR_LIB_UTILITIES_NEK_MATRIX_HPP
39 #define NEKTAR_LIB_UTILITIES_NEK_MATRIX_HPP
40 
46 
47 #ifdef NEKTAR_USE_EXPRESSION_TEMPLATES
48 // Only need NekVector if we are using expression templates so we can define the
49 // commutative traits.
50 #include <ExpressionTemplates/ExpressionTemplates.hpp>
52 #endif
53 namespace Nektar
54 {
55  template<typename DataType, typename FormType>
56  std::ostream& operator<<(std::ostream& os, const NekMatrix<DataType, FormType>& rhs)
57  {
58  int oswidth = 9;
59  int osprecision = 6;
60 
61  for(unsigned int i = 0; i < rhs.GetRows(); ++i)
62  {
63  os << "[";
64  for(unsigned int j = 0; j < rhs.GetColumns(); ++j)
65  {
66  os.width(oswidth);
67  os.precision(osprecision);
68  os << rhs(i,j);
69  if( j != rhs.GetColumns() - 1 )
70  {
71  os << ", ";
72  }
73  }
74  os << "]";
75  if( i != rhs.GetRows()-1 )
76  {
77  os << std::endl;
78  }
79  }
80  return os;
81  }
82 
83  template<typename DataType, typename FormType>
84  std::ostream& operator>>(std::ostream& os, const NekMatrix<DataType, FormType>& rhs)
85  {
86  NekDouble tol = 1e-12;
87  os << "[" << std::endl;
88 
89  for(unsigned int i = 0; i < rhs.GetRows(); ++i)
90  {
91  for(unsigned int j = 0; j < rhs.GetColumns(); ++j)
92  {
93  if((NekDouble)rhs(i,j) > tol)
94  {
95  os << '+';
96  }
97  else if((NekDouble)rhs(i,j) < -tol)
98  {
99  os << '*';
100  }
101  else
102  {
103  os << '-';
104  }
105  }
106  if( i != rhs.GetRows()-1 )
107  {
108  os << std::endl;
109  }
110  }
111  os << "]" << std::endl;
112  return os;
113  }
114 }
115 
116 
117 
118  #ifdef NEKTAR_USE_EXPRESSION_TEMPLATES
119 namespace expt
120 {
121  template<typename T>
122  struct IsBlockMatrix : public boost::false_type {};
123 
124  template<typename T>
125  struct IsBlockMatrix<Nektar::NekMatrix<T, Nektar::BlockMatrixTag> > : public boost::true_type {};
126 
127  template<typename DataType>
128  struct HasUnaryOp<NegateOp, DataType, typename boost::enable_if<IsBlockMatrix<DataType> >::type> : public boost::false_type {};
129 
130  template<typename LhsDataType, typename LhsMatrixType,
131  typename RhsDataType, typename RhsMatrixType>
132  struct CommutativeTraits<Nektar::NekMatrix<LhsDataType, LhsMatrixType> ,
133  expt::MultiplyOp, Nektar::NekMatrix<RhsDataType, RhsMatrixType> > : public boost::false_type
134  {
135  };
136 
137  template<typename LhsDataType, typename LhsMatrixType,
138  typename RhsDataType>
139  struct CommutativeTraits<Nektar::NekMatrix<LhsDataType, LhsMatrixType> ,
140  expt::MultiplyOp, Nektar::NekVector<RhsDataType> > : public boost::false_type
141  {
142  };
143 }
144 
145  #endif
146 
147 #endif //NEKTAR_LIB_UTILITIES_NEK_MATRIX_HPP
148