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A Discrete-Event Network Simulator
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API |
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A Discrete-Event Network Simulator
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API |
The laplacian distribution Random Number Generator (RNG). More...
#include "random-variable-stream.h"
Inheritance diagram for ns3::LaplacianRandomVariable: Collaboration diagram for ns3::LaplacianRandomVariable:Public Member Functions | |
| LaplacianRandomVariable () | |
| Creates an unbounded laplacian distribution RNG with the default values for the location and the scale. | |
| double | GetBound () const |
| Get the configured bound of this RNG. | |
| virtual uint32_t | GetInteger () |
| Get the next random value drawn from the distribution. | |
| uint32_t | GetInteger (uint32_t location, uint32_t scale, uint32_t bound) |
| Get the next random value drawn from the distribution. | |
| double | GetLocation () const |
| Get the configured location value of this RNG. | |
| double | GetScale () const |
| Get the configured scale value of this RNG. | |
| double | GetValue () override |
| Get the next random value drawn from the distribution. | |
| double | GetValue (double location, double scale, double bound) |
| Get the next random value drawn from the distribution. | |
| double | GetVariance () const |
| Returns the variance value for the laplacian distribution returned by this RNG stream. | |
| Public Member Functions inherited from ns3::RandomVariableStream | |
| RandomVariableStream () | |
| Default constructor. | |
| RandomVariableStream (const RandomVariableStream &)=delete | |
| ~RandomVariableStream () override | |
| Destructor. | |
| int64_t | GetStream () const |
| Returns the stream number for the RngStream. | |
| bool | IsAntithetic () const |
| Check if antithetic values will be generated. | |
| RandomVariableStream & | operator= (const RandomVariableStream &)=delete |
| void | SetAntithetic (bool isAntithetic) |
| Specify whether antithetic values should be generated. | |
| void | SetStream (int64_t stream) |
| Specifies the stream number for the RngStream. | |
| Public Member Functions inherited from ns3::Object | |
| Object () | |
| Constructor. | |
| ~Object () override | |
| Destructor. | |
| void | AggregateObject (Ptr< Object > other) |
| Aggregate two Objects together. | |
| void | Dispose () |
| Dispose of this Object. | |
| AggregateIterator | GetAggregateIterator () const |
| Get an iterator to the Objects aggregated to this one. | |
| TypeId | GetInstanceTypeId () const final |
| Get the most derived TypeId for this Object. | |
| template<typename T> | |
| Ptr< T > | GetObject () const |
| Get a pointer to the requested aggregated Object. | |
| template<> | |
| Ptr< Object > | GetObject () const |
| Specialization of () for objects of type ns3::Object. | |
| template<typename T> | |
| Ptr< T > | GetObject (TypeId tid) const |
| Get a pointer to the requested aggregated Object by TypeId. | |
| template<> | |
| Ptr< Object > | GetObject (TypeId tid) const |
| Specialization of (TypeId tid) for objects of type ns3::Object. | |
| void | Initialize () |
| Invoke DoInitialize on all Objects aggregated to this one. | |
| bool | IsInitialized () const |
| Check if the object has been initialized. | |
| void | UnidirectionalAggregateObject (Ptr< Object > other) |
| Aggregate an Object to another Object. | |
| Public Member Functions inherited from ns3::SimpleRefCount< Object, ObjectBase, ObjectDeleter > | |
| SimpleRefCount () | |
| Default constructor. | |
| SimpleRefCount (const SimpleRefCount &o) | |
| Copy constructor. | |
| uint32_t | GetReferenceCount () const |
| Get the reference count of the object. | |
| SimpleRefCount & | operator= (const SimpleRefCount &o) |
| Assignment operator. | |
| void | Ref () const |
| Increment the reference count. | |
| void | Unref () const |
| Decrement the reference count. | |
| Public Member Functions inherited from ns3::ObjectBase | |
| virtual | ~ObjectBase () |
| Virtual destructor. | |
| void | GetAttribute (std::string name, AttributeValue &value, bool permissive=false) const |
| Get the value of an attribute, raising fatal errors if unsuccessful. | |
| bool | GetAttributeFailSafe (std::string name, AttributeValue &value) const |
| Get the value of an attribute without raising errors. | |
| void | SetAttribute (std::string name, const AttributeValue &value) |
| Set a single attribute, raising fatal errors if unsuccessful. | |
| bool | SetAttributeFailSafe (std::string name, const AttributeValue &value) |
| Set a single attribute without raising errors. | |
| bool | TraceConnect (std::string name, std::string context, const CallbackBase &cb) |
| Connect a TraceSource to a Callback with a context. | |
| bool | TraceConnectWithoutContext (std::string name, const CallbackBase &cb) |
| Connect a TraceSource to a Callback without a context. | |
| bool | TraceDisconnect (std::string name, std::string context, const CallbackBase &cb) |
| Disconnect from a TraceSource a Callback previously connected with a context. | |
| bool | TraceDisconnectWithoutContext (std::string name, const CallbackBase &cb) |
| Disconnect from a TraceSource a Callback previously connected without a context. | |
Static Public Member Functions | |
| static TypeId | GetTypeId () |
| Register this type. | |
| static double | GetVariance (double scale) |
| Returns the variance value for the laplacian distribution returned by this RNG stream. | |
| Static Public Member Functions inherited from ns3::RandomVariableStream | |
| static TypeId | GetTypeId () |
| Register this type. | |
| Static Public Member Functions inherited from ns3::Object | |
| static TypeId | GetTypeId () |
| Register this type. | |
| Static Public Member Functions inherited from ns3::ObjectBase | |
| static TypeId | GetTypeId () |
| Get the type ID. | |
Private Attributes | |
| double | m_bound |
| The bound on values that can be returned by this RNG stream. | |
| double | m_location |
| The location value of the laplacian distribution. | |
| double | m_scale |
| The scale value of the laplacian distribution. | |
Additional Inherited Members | |
| Protected Member Functions inherited from ns3::RandomVariableStream | |
| RngStream * | Peek () const |
| Get the pointer to the underlying RngStream. | |
| Protected Member Functions inherited from ns3::Object | |
| Object (const Object &o) | |
| Copy an Object. | |
| virtual void | DoDispose () |
| Destructor implementation. | |
| virtual void | DoInitialize () |
| Initialize() implementation. | |
| virtual void | NotifyNewAggregate () |
| Notify all Objects aggregated to this one of a new Object being aggregated. | |
| Protected Member Functions inherited from ns3::ObjectBase | |
| void | ConstructSelf (const AttributeConstructionList &attributes) |
| Complete construction of ObjectBase; invoked by derived classes. | |
| virtual void | NotifyConstructionCompleted () |
| Notifier called once the ObjectBase is fully constructed. | |
| Related Symbols inherited from ns3::ObjectBase | |
| static TypeId | GetObjectIid () |
| Ensure the TypeId for ObjectBase gets fully configured to anchor the inheritance tree properly. | |
The laplacian distribution Random Number Generator (RNG).
This class supports the creation of objects that return random numbers from a fixed laplacian distribution.
The probability density function of a laplacian variable is defined as:
![\[ P(x; \mu, \beta) dx = \frac{1}{2 \beta} e^{\frac{- \abs{x - \mu}}{\beta}} dx
\]](../../form_141_dark.png)
where 
Location configurable attribute and 
Scale configurable attribute. This distribution has mean 
The laplacian RNG value 
![\[ x = \mu - \beta sgn(u) \log(1 - 2 \abs{u})
\]](../../form_144_dark.png)
where 
The Laplacian distribution can be bounded symmetrically about the mean by the Bound parameter, 
![$[\mu - b, \mu + b]$](../../form_59_dark.png)
ns3::LaplacianRandomVariable is accessible through the following paths with Config::Set and Config::Connect:
No TraceSources are defined for this type
Group: Core
Size of this type is 104 bytes (on a 64-bit architecture).
Definition at line 2327 of file random-variable-stream.h.
| ns3::LaplacianRandomVariable::LaplacianRandomVariable | ( | ) |
Creates an unbounded laplacian distribution RNG with the default values for the location and the scale.
Definition at line 1888 of file random-variable-stream.cc.
References NS_LOG_FUNCTION.
Referenced by GetTypeId().
Here is the caller graph for this function:| double ns3::LaplacianRandomVariable::GetBound | ( | ) | const |
Get the configured bound of this RNG.
Definition at line 1906 of file random-variable-stream.cc.
References m_bound.
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virtual |
Get the next random value drawn from the distribution.
Reimplemented from ns3::RandomVariableStream.
Definition at line 145 of file random-variable-stream.cc.
| uint32_t ns3::LaplacianRandomVariable::GetInteger | ( | uint32_t | location, |
| uint32_t | scale, | ||
| uint32_t | bound ) |
Get the next random value drawn from the distribution.
| [in] | location | location value of the laplacian distribution. |
| [in] | scale | scale value of the laplacian distribution. |
| [in] | bound | bound on values returned. |
Definition at line 1939 of file random-variable-stream.cc.
References GetValue(), and NS_LOG_FUNCTION.
Here is the call graph for this function:| double ns3::LaplacianRandomVariable::GetLocation | ( | ) | const |
Get the configured location value of this RNG.
Definition at line 1894 of file random-variable-stream.cc.
References m_location.
| double ns3::LaplacianRandomVariable::GetScale | ( | ) | const |
Get the configured scale value of this RNG.
Definition at line 1900 of file random-variable-stream.cc.
References m_scale.
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static |
Register this type.
Definition at line 1861 of file random-variable-stream.cc.
References LaplacianRandomVariable(), ns3::RandomVariableStream::RandomVariableStream(), m_bound, m_location, m_scale, ns3::MakeDoubleAccessor(), ns3::MakeDoubleChecker(), and ns3::TypeId::SetParent().
Here is the call graph for this function:
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overridevirtual |
Get the next random value drawn from the distribution.
Implements ns3::RandomVariableStream.
Definition at line 1946 of file random-variable-stream.cc.
References GetValue(), m_bound, m_location, m_scale, and NS_LOG_FUNCTION.
Referenced by GetInteger(), and GetValue().
Here is the call graph for this function: Here is the caller graph for this function:Get the next random value drawn from the distribution.
| [in] | location | location value of the laplacian distribution. |
| [in] | scale | scale value of the laplacian distribution. |
| [in] | bound | bound on values returned. |
Definition at line 1912 of file random-variable-stream.cc.
References ns3::RandomVariableStream::IsAntithetic(), NS_ABORT_MSG_IF, NS_LOG_FUNCTION, ns3::RandomVariableStream::Peek(), and ns3::RngStream::RandU01().
Here is the call graph for this function:| double ns3::LaplacianRandomVariable::GetVariance | ( | ) | const |
Returns the variance value for the laplacian distribution returned by this RNG stream.
Definition at line 1960 of file random-variable-stream.cc.
References GetVariance(), and m_scale.
Referenced by ns3::test::RandomVariable::LaplacianTestCase::DoRun(), and GetVariance().
Here is the call graph for this function: Here is the caller graph for this function:Returns the variance value for the laplacian distribution returned by this RNG stream.
| [in] | scale | scale value of the laplacian distribution. |
Definition at line 1953 of file random-variable-stream.cc.
References NS_LOG_FUNCTION.
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private |
The bound on values that can be returned by this RNG stream.
Definition at line 2397 of file random-variable-stream.h.
Referenced by GetBound(), GetTypeId(), and GetValue().
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private |
The location value of the laplacian distribution.
Definition at line 2391 of file random-variable-stream.h.
Referenced by GetLocation(), GetTypeId(), and GetValue().
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private |
The scale value of the laplacian distribution.
Definition at line 2394 of file random-variable-stream.h.
Referenced by GetScale(), GetTypeId(), GetValue(), and GetVariance().
1.13.2