Eigen  3.3.90 (mercurial changeset b6d3e557dd16)
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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  inline const Scalar operator() () const { return random<Scalar>(); }
20 };
21 
22 template<typename Scalar>
23 struct functor_traits<scalar_random_op<Scalar> >
24 { enum { Cost = 5 * NumTraits<Scalar>::MulCost, PacketAccess = false, IsRepeatable = false }; };
25 
26 } // end namespace internal
27 
54 template<typename Derived>
55 inline const typename DenseBase<Derived>::RandomReturnType
57 {
58  return NullaryExpr(rows, cols, internal::scalar_random_op<Scalar>());
59 }
60 
85 template<typename Derived>
86 inline const typename DenseBase<Derived>::RandomReturnType
88 {
89  return NullaryExpr(size, internal::scalar_random_op<Scalar>());
90 }
91 
111 template<typename Derived>
112 inline const typename DenseBase<Derived>::RandomReturnType
114 {
115  return NullaryExpr(RowsAtCompileTime, ColsAtCompileTime, internal::scalar_random_op<Scalar>());
116 }
117 
130 template<typename Derived>
131 EIGEN_DEVICE_FUNC inline Derived& DenseBase<Derived>::setRandom()
132 {
133  return *this = Random(rows(), cols());
134 }
135 
149 template<typename Derived>
150 EIGEN_STRONG_INLINE Derived&
152 {
153  resize(newSize);
154  return setRandom();
155 }
156 
172 template<typename Derived>
173 EIGEN_STRONG_INLINE Derived&
175 {
176  resize(rows, cols);
177  return setRandom();
178 }
179 
180 } // end namespace Eigen
181 
182 #endif // EIGEN_RANDOM_H
Generic expression of a matrix where all coefficients are defined by a functor.
Definition: CwiseNullaryOp.h:60
Derived & setRandom()
Definition: Random.h:131
Derived & setRandom(Index size)
Definition: Random.h:151
Eigen::Index Index
The interface type of indices.
Definition: EigenBase.h:38
static const RandomReturnType Random()
Definition: Random.h:113
EIGEN_DEFAULT_DENSE_INDEX_TYPE Index
The Index type as used for the API.
Definition: Meta.h:33