Eigen  3.2.92
Random.h
1 // This file is part of Eigen, a lightweight C++ template library
2 // for linear algebra.
3 //
4 // Copyright (C) 2008 Gael Guennebaud <gael.guennebaud@inria.fr>
5 //
6 // This Source Code Form is subject to the terms of the Mozilla
7 // Public License v. 2.0. If a copy of the MPL was not distributed
8 // with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
9 
10 #ifndef EIGEN_RANDOM_H
11 #define EIGEN_RANDOM_H
12 
13 namespace Eigen {
14 
15 namespace internal {
16 
17 template<typename Scalar> struct scalar_random_op {
18  EIGEN_EMPTY_STRUCT_CTOR(scalar_random_op)
19  template<typename Index>
20  inline const Scalar operator() (Index, Index = 0) const { return random<Scalar>(); }
21 };
22 
23 template<typename Scalar>
24 struct functor_traits<scalar_random_op<Scalar> >
25 { enum { Cost = 5 * NumTraits<Scalar>::MulCost, PacketAccess = false, IsRepeatable = false }; };
26 
27 } // end namespace internal
28 
55 template<typename Derived>
56 inline const typename DenseBase<Derived>::RandomReturnType
57 DenseBase<Derived>::Random(Index rows, Index cols)
58 {
59  return NullaryExpr(rows, cols, internal::scalar_random_op<Scalar>());
60 }
61 
86 template<typename Derived>
87 inline const typename DenseBase<Derived>::RandomReturnType
89 {
90  return NullaryExpr(size, internal::scalar_random_op<Scalar>());
91 }
92 
112 template<typename Derived>
113 inline const typename DenseBase<Derived>::RandomReturnType
115 {
116  return NullaryExpr(RowsAtCompileTime, ColsAtCompileTime, internal::scalar_random_op<Scalar>());
117 }
118 
131 template<typename Derived>
133 {
134  return *this = Random(rows(), cols());
135 }
136 
150 template<typename Derived>
151 EIGEN_STRONG_INLINE Derived&
153 {
154  resize(newSize);
155  return setRandom();
156 }
157 
173 template<typename Derived>
174 EIGEN_STRONG_INLINE Derived&
175 PlainObjectBase<Derived>::setRandom(Index rows, Index cols)
176 {
177  resize(rows, cols);
178  return setRandom();
179 }
180 
181 } // end namespace Eigen
182 
183 #endif // EIGEN_RANDOM_H
Generic expression of a matrix where all coefficients are defined by a functor.
Definition: CwiseNullaryOp.h:44
Derived & setRandom()
Definition: Random.h:132
Derived & setRandom(Index size)
Definition: Random.h:152
Definition: LDLT.h:16
static const RandomReturnType Random()
Definition: Random.h:114
Definition: Eigen_Colamd.h:54