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v2w_w2v/norm.hh
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25 
26 #ifndef MLN_FUN_V2W_W2V_NORM_HH
27 # define MLN_FUN_V2W_W2V_NORM_HH
28 
34 
35 # include <mln/core/concept/function.hh>
36 # include <mln/trait/value_.hh>
37 
38 # include <mln/norm/all.hh>
39 
40 
41 namespace mln
42 {
43 
44  namespace fun
45  {
46 
47  namespace v2w_w2v
48  {
49 
55  template <typename V, typename R>
56  struct l1_norm : public Function_v2v< l1_norm<V, R> >
57  {
58  typedef R result;
59  R operator()(const V& v) const;
60  V f_1(const V& v, const R& r) const;
61  };
62 
68  template <typename V, typename R>
69  struct l2_norm : public Function_v2v< l2_norm<V, R> >
70  {
71  typedef R result;
72  R operator()(const V& v) const;
73  V f_1(const V& v, const R& r) const;
74  };
75 
81  template <typename V, typename R>
82  struct linfty_norm : public Function_v2v< linfty_norm<V, R> >
83  {
84  typedef R result;
85  R operator()(const V& v) const;
86  V f_1(const V& v, const R& r) const;
87  };
88 
89 
90 # ifndef MLN_INCLUDE_ONLY
91 
92  template <typename V, typename R>
93  inline
94  R
95  l1_norm<V, R>::operator()(const V& v) const
96  {
97  return mln::norm::l1 (v);
98  }
99 
100  template <typename V, typename R>
101  inline
102  V
103  l1_norm<V, R>::f_1(const V& v, const R& r) const
104  {
105  return v / mln::norm::l1 (v) * r;
106  }
107 
108  template <typename V, typename R>
109  inline
110  R
111  l2_norm<V, R>::operator()(const V& v) const
112  {
113  return mln::norm::l2 (v);
114  }
115 
116  template <typename V, typename R>
117  inline
118  V
119  l2_norm<V, R>::f_1(const V& v, const R& r) const
120  {
121  return v / mln::norm::l2 (v) * r;
122  }
123 
124  template <typename V, typename R>
125  inline
126  R
127  linfty_norm<V, R>::operator()(const V& v) const
128  {
129  return mln::norm::linfty (v);
130  }
131 
132  template <typename V, typename R>
133  inline
134  V
135  linfty_norm<V, R>::f_1(const V& v, const R& r) const
136  {
137  return v / mln::norm::linfty (v) * r;
138  }
139 
140 # endif // ! MLN_INCLUDE_ONLY
141 
142  } // end of namespace mln::fun::v2w_w2v
143 
144  } // end of namespace mln::fun
145 
146 } // end of namespace mln
147 
148 
149 #endif // ! MLN_FUN_V2W_W2V_NORM_HH