logarithm.cpp
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1 /*
2  * This file is part of ACADO Toolkit.
3  *
4  * ACADO Toolkit -- A Toolkit for Automatic Control and Dynamic Optimization.
5  * Copyright (C) 2008-2014 by Boris Houska, Hans Joachim Ferreau,
6  * Milan Vukov, Rien Quirynen, KU Leuven.
7  * Developed within the Optimization in Engineering Center (OPTEC)
8  * under supervision of Moritz Diehl. All rights reserved.
9  *
10  * ACADO Toolkit is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU Lesser General Public
12  * License as published by the Free Software Foundation; either
13  * version 3 of the License, or (at your option) any later version.
14  *
15  * ACADO Toolkit is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18  * Lesser General Public License for more details.
19  *
20  * You should have received a copy of the GNU Lesser General Public
21  * License along with ACADO Toolkit; if not, write to the Free Software
22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23  *
24  */
25 
26 
27 
37 
38 
39 double dLogarithm(double x){
40  return 1/x;
41 }
42 
43 
44 double ddLogarithm(double x){
45  return -1/x/x;
46 }
47 
49 
50 
52  cName = "log";
53 
54  fcn = &log;
55  dfcn = &dLogarithm;
56  ddfcn = &ddLogarithm;
57 
59 
60 }
61 
62 Logarithm::Logarithm( Operator *_argument ):UnaryOperator(_argument){
63  cName = "log";
64 
65  fcn = &log;
66  dfcn = &dLogarithm;
67  ddfcn = &ddLogarithm;
68 
70 }
71 
72 
74  cName = "log";
75 
76  fcn = &log;
77  dfcn = &dLogarithm;
78  ddfcn = &ddLogarithm;
79 
81 }
82 
83 
85 
86 }
87 
88 
90 
92 
93  return *this;
94 }
95 
96 
98 
99  x->Log(*argument);
100  return SUCCESSFUL_RETURN;
101 }
102 
103 
104 
105 Operator* Logarithm::substitute( int index, const Operator *sub ){
106 
107  return new Logarithm( argument->substitute( index , sub ) );
108 
109 }
110 
112 
113  return new Logarithm(*this);
114 }
115 
116 
118 
119  if( curvature != CT_UNKNOWN ) return curvature;
120 
121  const CurvatureType cc = argument->getCurvature();
122 
123  if( cc == CT_CONSTANT ) return CT_CONSTANT;
124  if( cc == CT_AFFINE ) return CT_CONCAVE ;
125  if( cc == CT_CONCAVE ) return CT_CONCAVE ;
126 
128 }
129 
131 
132  if( initialized ) return SUCCESSFUL_RETURN;
134 
137 
138  return argument->initDerivative();
139 }
140 
141 
143 
144 // end of file.
virtual void Log(Operator &arg)=0
Operator * derivative2
Abstract base class for all scalar-valued symbolic operators.
Definition: operator.hpp:60
double(* ddfcn)(double)
Operator * derivative
Abstract base class for all scalar-valued unary operators within the symbolic operators family...
Allows to pass back messages to the calling function.
virtual Operator * clone() const =0
virtual Operator * substitute(int index, const Operator *sub)=0
#define CLOSE_NAMESPACE_ACADO
Operator * argument
BooleanType initialized
Definition: operator.hpp:642
double(* dfcn)(double)
UnaryOperator & operator=(const UnaryOperator &arg)
Logarithm & operator=(const Logarithm &arg)
Definition: logarithm.cpp:89
virtual Operator * clone() const
Definition: logarithm.cpp:111
Implements the scalar power operator with integer exponent within the symbolic operators family...
Definition: powerint.hpp:55
double ddLogarithm(double x)
Definition: logarithm.cpp:44
virtual returnValue initDerivative()
Definition: operator.cpp:519
CurvatureType curvature
virtual returnValue initDerivative()
Definition: logarithm.cpp:130
#define BT_TRUE
Definition: acado_types.hpp:47
std::string cName
OperatorName operatorName
CurvatureType
double dLogarithm(double x)
Definition: logarithm.cpp:39
virtual TreeProjection * convert2TreeProjection(Operator *a) const
Definition: operator.cpp:312
#define BEGIN_NAMESPACE_ACADO
Implements the scalar logarithm operator within the symbolic operators family.
Definition: logarithm.hpp:55
Abstract base class for templated evaluation of operators.
virtual CurvatureType getCurvature()=0
virtual Operator * substitute(int index, const Operator *sub)
Definition: logarithm.cpp:105
virtual CurvatureType getCurvature()
Definition: logarithm.cpp:117
virtual returnValue evaluate(EvaluationBase *x)
Definition: logarithm.cpp:97
double(* fcn)(double)
Implements a scalar constant within the symbolic operators family.
Implements the scalar product operator within the symbolic operators family.
Definition: product.hpp:55
IntermediateState log(const Expression &arg)


acado
Author(s): Milan Vukov, Rien Quirynen
autogenerated on Mon Jun 10 2019 12:34:48