bpp-core  2.1.0
bpp::DiscreteDistribution Class Reference

Interface for discrete distribution objects. More...

#include <Bpp/Numeric/Prob/DiscreteDistribution.h>

+ Inheritance diagram for bpp::DiscreteDistribution:
+ Collaboration diagram for bpp::DiscreteDistribution:

List of all members.

Public Member Functions

 DiscreteDistribution ()
virtual ~DiscreteDistribution ()
DiscreteDistributionclone () const =0
 Create a copy of this object and send a pointer to it.
virtual std::string getName () const =0
 Get the name of the distribution.
virtual size_t getNumberOfCategories () const =0
virtual void setNumberOfCategories (size_t nbClasses)=0
 sets the number of categories and discretizes if there is a change in this number.
virtual double getValueCategory (double value) const =0
virtual double getCategory (size_t categoryIndex) const =0
virtual double getProbability (size_t categoryIndex) const =0
virtual double getProbability (double category) const =0
virtual Vdouble getCategories () const =0
virtual Vdouble getProbabilities () const =0
virtual void set (double category, double probability)=0
 Set the probability associated to a class.
virtual void add (double category, double probability)=0
 Modify the probability associated to a class.
virtual double getInfCumulativeProbability (double category) const =0
virtual double getIInfCumulativeProbability (double category) const =0
virtual double getSupCumulativeProbability (double category) const =0
virtual double getSSupCumulativeProbability (double category) const =0
virtual double rand () const =0
 Draw a random number from this distribution.
virtual double randC () const =0 throw (Exception)
 Draw a random number from the continuous version of this distribution, if it exists.
virtual double qProb (double x) const =0
 Return the quantile of the continuous version of the distribution, ie y such that $ Prob(X<y)=x $.
virtual double pProb (double x) const =0
 Return the cumulative quantile of the continuous version of the distribution, ie $ Prob(X<x) $.
virtual double Expectation (double a) const =0
 Return a primitive function used for the expectation of the continuous version of the distribution, ie $ E(X|...<=X<a) = \int_{...}^a t.dProb(t) dt $.
virtual void setMedian (bool median)=0
 Sets the median value to true to say that the value in a class is proportional to the median value of the class, the proportionality factor being such that the sum of the values equals the expectation of the distribution. If it is set to false, the value is the mean value in the class.
virtual void discretize ()=0
 Discretizes the distribution in equiprobable classes.
virtual Vdouble getBounds () const =0
virtual double getBound (size_t) const =0
virtual double getLowerBound () const
 methods about the range of the definition
virtual double getUpperBound () const
virtual bool strictLowerBound () const
virtual bool strictUpperBound () const
virtual void restrictToConstraint (const Constraint &c)=0
 Restricts the distribution to the domain where the constraint is respected, in addition of other predefined constraints.
virtual void print (OutputStream &out) const =0
 Print the distribution (categories and corresponding probabilities) to a stream.
virtual size_t getNumberOfIndependentParameters () const =0
 Get the number of independent parameters.
virtual void aliasParameters (const std::string &p1, const std::string &p2)=0 throw (ParameterNotFoundException, Exception)
 Set two parameters as 'aliased'.
virtual void unaliasParameters (const std::string &p1, const std::string &p2)=0 throw (ParameterNotFoundException, Exception)
 Detach two parameters previously set as 'aliased'.
virtual const ParameterListgetIndependentParameters () const =0
 Get the minimal list of parameters to set the model.
virtual std::vector< std::string > getAlias (const std::string &name) const =0
virtual bool hasParameter (const std::string &name) const =0
 Tell if there is a parameter with specified name.
virtual const ParameterListgetParameters () const =0
 Get all parameters available.
virtual const ParametergetParameter (const std::string &name) const =0 throw (ParameterNotFoundException)
 Get the parameter with specified name.
virtual double getParameterValue (const std::string &name) const =0 throw (ParameterNotFoundException)
 Get the value for parameter of name 'name'.
virtual void setAllParametersValues (const ParameterList &parameters)=0 throw (ParameterNotFoundException, ConstraintException)
 Set the parameters values to be equals to those of parameters.
virtual void setParameterValue (const std::string &name, double value)=0 throw (ParameterNotFoundException, ConstraintException)
 Set the value of parameter with name name to be equal to value.
virtual void setParametersValues (const ParameterList &parameters)=0 throw (ParameterNotFoundException, ConstraintException)
 Update the parameters from parameters.
virtual bool matchParametersValues (const ParameterList &parameters)=0 throw (ConstraintException)
 Update the parameters from parameters.
virtual size_t getNumberOfParameters () const =0
 Get the number of parameters.
virtual void setNamespace (const std::string &prefix)=0
 Set the namespace for the parameter names.
virtual std::string getNamespace () const =0
virtual std::string getParameterNameWithoutNamespace (const std::string &name) const =0
 Resolves a parameter name according to the current namespace.

Detailed Description

Interface for discrete distribution objects.

A discrete distribution usually contains a finite set of categories and a probability associated to each.

Each category (or class) is defined by two bounds, and sometimes by a mean or a median value.

A discrete distribution may contain one or several parameters. The probabilities associated to each class usually depends on the parameter values. In some cases, the number and/or bounds of the classes may also depend on the parameters values, depending on the kind of discretization used.

Definition at line 68 of file DiscreteDistribution.h.


Constructor & Destructor Documentation

virtual bpp::DiscreteDistribution::~DiscreteDistribution ( ) [inline, virtual]

Definition at line 73 of file DiscreteDistribution.h.


Member Function Documentation

virtual void bpp::DiscreteDistribution::add ( double  category,
double  probability 
) [pure virtual]

Modify the probability associated to a class.

If the category does not exist, a new category is created with the corresponding probability. if the category exists, add 'probability' to the existing probability. The sum of all probabilities is not checked.

Parameters:
categoryThe class value.
probabilityThe class probability.

Implemented in bpp::AbstractDiscreteDistribution.

virtual void bpp::ParameterAliasable::aliasParameters ( const std::string &  p1,
const std::string &  p2 
) throw (ParameterNotFoundException, Exception) [pure virtual, inherited]

Set two parameters as 'aliased'.

The values of the two parameters will be synchronized, so that setting the value of one parameter will automatically set the value of the other one accordingly.

Parameters:
p1Original parameter.
p2Aliased parameter.
Exceptions:
ParameterNotFoundExceptionif p1 or p2 do not correspond to existing parameters.
Exceptionwhen trying to perform non-valid association.

Implemented in bpp::AbstractParameterAliasable.

virtual std::vector<std::string> bpp::ParameterAliasable::getAlias ( const std::string &  name) const [pure virtual, inherited]
Returns:
The list of names of the parameters that are aliased with a given parameter. Depending on the implementation, the function may be recursive or not...
Parameters:
nameThe name of the parameter to look for.

Implemented in bpp::AbstractParameterAliasable.

Referenced by bpp::BppOParametrizableFormat::write().

virtual double bpp::DiscreteDistribution::getBound ( size_t  ) const [pure virtual]
Returns:
the i th internal bound

Implemented in bpp::AbstractDiscreteDistribution.

Referenced by bpp::InvariantMixedDiscreteDistribution::updateDistribution().

virtual Vdouble bpp::DiscreteDistribution::getBounds ( ) const [pure virtual]
Returns:
A vector of all the bounds

Implemented in bpp::AbstractDiscreteDistribution.

virtual Vdouble bpp::DiscreteDistribution::getCategories ( ) const [pure virtual]
Returns:
A vector with all classes values.

Implemented in bpp::AbstractDiscreteDistribution.

Referenced by bpp::InvariantMixedDiscreteDistribution::updateDistribution().

virtual double bpp::DiscreteDistribution::getCategory ( size_t  categoryIndex) const [pure virtual]
Parameters:
categoryIndexClass index.
Returns:
The value associated to a given class.

Implemented in bpp::AbstractDiscreteDistribution.

Referenced by bpp::InvariantMixedDiscreteDistribution::updateDistribution().

virtual double bpp::DiscreteDistribution::getIInfCumulativeProbability ( double  category) const [pure virtual]
Returns:
$Pr(x \leq \mbox{category})$.
Parameters:
categoryThe class value.

Implemented in bpp::AbstractDiscreteDistribution.

virtual const ParameterList& bpp::ParameterAliasable::getIndependentParameters ( ) const [pure virtual, inherited]

Get the minimal list of parameters to set the model.

If no parameters are aliased, this is the same a getParameters().

Returns:
A minimal set of parameters.

Implemented in bpp::AbstractParameterAliasable.

Referenced by bpp::InvariantMixedDiscreteDistribution::InvariantMixedDiscreteDistribution(), bpp::BppODiscreteDistributionFormat::write(), and bpp::BppOParametrizableFormat::write().

virtual double bpp::DiscreteDistribution::getInfCumulativeProbability ( double  category) const [pure virtual]
Returns:
$Pr(x < \mbox{category})$.
Parameters:
categoryThe class value.

Implemented in bpp::AbstractDiscreteDistribution.

virtual double bpp::DiscreteDistribution::getLowerBound ( ) const [inline, virtual]

methods about the range of the definition

Returns:
The lowest value.

Reimplemented in bpp::AbstractDiscreteDistribution, bpp::SimpleDiscreteDistribution, and bpp::ConstantDistribution.

Definition at line 271 of file DiscreteDistribution.h.

References bpp::NumConstants::VERY_BIG().

Referenced by bpp::InvariantMixedDiscreteDistribution::updateDistribution().

virtual std::string bpp::Parametrizable::getNamespace ( ) const [pure virtual, inherited]
Returns:
The current namespace used. This is an empty string if no namespace is currently defined.

Implemented in bpp::FunctionWrapper, bpp::ParametrizableAdapter, and bpp::AbstractParametrizable.

Referenced by bpp::FunctionWrapper::getNamespace().

virtual size_t bpp::ParameterAliasable::getNumberOfIndependentParameters ( ) const [pure virtual, inherited]

Get the number of independent parameters.

Returns:
The number of independent parameters. If no parameters are aliased, this is equivalent to the getNumberOfParameters() method.

Implemented in bpp::AbstractParameterAliasable.

virtual size_t bpp::Parametrizable::getNumberOfParameters ( ) const [pure virtual, inherited]

Get the number of parameters.

See also:
getNumberOfIndependentParameters If some parameters are aliased.
Returns:
The number of parameters.

Implemented in bpp::FunctionWrapper, bpp::ParametrizableAdapter, bpp::AbstractParametrizable, and bpp::DirectionFunction.

Referenced by bpp::FunctionWrapper::getNumberOfParameters(), and bpp::BppODiscreteDistributionFormat::write().

virtual const Parameter& bpp::Parametrizable::getParameter ( const std::string &  name) const throw (ParameterNotFoundException) [pure virtual, inherited]

Get the parameter with specified name.

Parameters:
nameThe name of the parameter to look for.
Returns:
The parameter with given name.
Exceptions:
ParameterNotFoundExceptionif no parameter with this name is found.

Implemented in bpp::FunctionWrapper, bpp::ParametrizableAdapter, and bpp::AbstractParametrizable.

Referenced by bpp::FunctionWrapper::getParameter().

virtual std::string bpp::Parametrizable::getParameterNameWithoutNamespace ( const std::string &  name) const [pure virtual, inherited]

Resolves a parameter name according to the current namespace.

Returns:
The parameter name without the namespace prefix, if any.

Implemented in bpp::FunctionWrapper, bpp::ParametrizableAdapter, and bpp::AbstractParametrizable.

Referenced by bpp::FunctionWrapper::getParameterNameWithoutNamespace(), bpp::BppODiscreteDistributionFormat::read(), and bpp::BppOParametrizableFormat::write().

virtual const ParameterList& bpp::Parametrizable::getParameters ( ) const [pure virtual, inherited]
virtual double bpp::Parametrizable::getParameterValue ( const std::string &  name) const throw (ParameterNotFoundException) [pure virtual, inherited]

Get the value for parameter of name 'name'.

Parameters:
nameThe name of the parameter.
Returns:
the value of parameter name.

Implemented in bpp::FunctionWrapper, bpp::ParametrizableAdapter, and bpp::AbstractParametrizable.

Referenced by bpp::FunctionWrapper::getParameterValue(), and bpp::BppODiscreteDistributionFormat::read().

virtual Vdouble bpp::DiscreteDistribution::getProbabilities ( ) const [pure virtual]
Returns:
A vector with all probabilities.

Implemented in bpp::AbstractDiscreteDistribution.

Referenced by bpp::InvariantMixedDiscreteDistribution::updateDistribution().

virtual double bpp::DiscreteDistribution::getProbability ( size_t  categoryIndex) const [pure virtual]
Parameters:
categoryIndexClass index.
Returns:
The probability associated to a given class.

Implemented in bpp::AbstractDiscreteDistribution.

virtual double bpp::DiscreteDistribution::getProbability ( double  category) const [pure virtual]
Parameters:
categoryThe value associated to the class.
Returns:
The probability associated to a given class.

Implemented in bpp::AbstractDiscreteDistribution.

virtual double bpp::DiscreteDistribution::getSSupCumulativeProbability ( double  category) const [pure virtual]
Returns:
$Pr(x \geq \mbox{category})$.
Parameters:
categoryThe class value.

Implemented in bpp::AbstractDiscreteDistribution.

virtual double bpp::DiscreteDistribution::getSupCumulativeProbability ( double  category) const [pure virtual]
Returns:
$Pr(x > \mbox{category})$.
Parameters:
categoryThe class value.

Implemented in bpp::AbstractDiscreteDistribution.

virtual double bpp::DiscreteDistribution::getValueCategory ( double  value) const [pure virtual]
Parameters:
value
Returns:
The value of the category the value is in. Throws a OutOfRangeException if the value is off the domain of the DiscreteDistribution.

Implemented in bpp::AbstractDiscreteDistribution.

virtual bool bpp::Parametrizable::hasParameter ( const std::string &  name) const [pure virtual, inherited]

Tell if there is a parameter with specified name.

Parameters:
nameThe name of the parameter to look for.
Returns:
y/n.

Implemented in bpp::FunctionWrapper, bpp::ParametrizableAdapter, and bpp::AbstractParametrizable.

Referenced by bpp::FunctionWrapper::hasParameter().

virtual bool bpp::Parametrizable::matchParametersValues ( const ParameterList parameters) throw (ConstraintException) [pure virtual, inherited]

Update the parameters from parameters.

Only common parameters with parameters will be updated.

Parameters:
parametersA list of parameters.
Returns:
True if at least one parameter value has been changed.
Exceptions:
ConstraintExceptionIf a value in parameters does not match the constraint in the corresponding parameter in the list.

Implemented in bpp::InfinityFunctionWrapper, bpp::FunctionWrapper, bpp::AbstractNumericalDerivative, bpp::ParametrizableAdapter, and bpp::AbstractParametrizable.

Referenced by bpp::InvariantMixedDiscreteDistribution::fireParameterChanged(), bpp::AbstractNumericalDerivative::matchParametersValues(), bpp::FunctionWrapper::matchParametersValues(), and bpp::InfinityFunctionWrapper::matchParametersValues().

virtual void bpp::DiscreteDistribution::print ( OutputStream out) const [pure virtual]

Print the distribution (categories and corresponding probabilities) to a stream.

Parameters:
outThe outstream where to print the distribution.

Implemented in bpp::AbstractDiscreteDistribution.

virtual double bpp::DiscreteDistribution::rand ( ) const [pure virtual]

Draw a random number from this distribution.

This number will be one of the class values, drawn according to the class probabilities.

Returns:
A random number according to this distribution.

Implemented in bpp::AbstractDiscreteDistribution.

virtual double bpp::DiscreteDistribution::randC ( ) const throw (Exception) [pure virtual]

Draw a random number from the continuous version of this distribution, if it exists.

Uses the continuous version of this distribution to draw a random number.

Returns:
A random number according to this distribution.
Exceptions:
ExceptionIf there is no continuous version of this distribution.

Implemented in bpp::AbstractDiscreteDistribution, bpp::TruncatedExponentialDiscreteDistribution, bpp::BetaDiscreteDistribution, bpp::ExponentialDiscreteDistribution, bpp::GammaDiscreteDistribution, bpp::GaussianDiscreteDistribution, bpp::UniformDiscreteDistribution, and bpp::ConstantDistribution.

virtual void bpp::DiscreteDistribution::restrictToConstraint ( const Constraint c) [pure virtual]

Restricts the distribution to the domain where the constraint is respected, in addition of other predefined constraints.

If the domain interval is modified, the discretization process is launched.

Parameters:
cThe Constraint to respect.

Implemented in bpp::AbstractDiscreteDistribution, bpp::MixtureOfDiscreteDistributions, bpp::SimpleDiscreteDistribution, bpp::InvariantMixedDiscreteDistribution, bpp::TruncatedExponentialDiscreteDistribution, and bpp::ConstantDistribution.

Referenced by bpp::InvariantMixedDiscreteDistribution::restrictToConstraint().

virtual void bpp::DiscreteDistribution::set ( double  category,
double  probability 
) [pure virtual]

Set the probability associated to a class.

If the category does not exist, a new category is created with the corresponding probability. If the category already exist, its probability is set to 'probability'. The sum of all probabilities is not checked.

Parameters:
categoryThe class value.
probabilityThe class probability.

Implemented in bpp::AbstractDiscreteDistribution.

virtual void bpp::Parametrizable::setAllParametersValues ( const ParameterList parameters) throw (ParameterNotFoundException, ConstraintException) [pure virtual, inherited]

Set the parameters values to be equals to those of parameters.

The list must contain exactly the same parameters (ie same names) than the parameters available.

Parameters:
parametersA list with all parameters.
Exceptions:
ParameterNotFoundExceptionIf a some parameter in the list is not in params.
ConstraintExceptionIf a value in parameters does not match the constraint in the corresponding parameter in the list.

Implemented in bpp::InfinityFunctionWrapper, bpp::FunctionWrapper, bpp::AbstractNumericalDerivative, bpp::ParametrizableAdapter, and bpp::AbstractParametrizable.

Referenced by bpp::AbstractNumericalDerivative::setAllParametersValues(), bpp::FunctionWrapper::setAllParametersValues(), and bpp::InfinityFunctionWrapper::setAllParametersValues().

virtual void bpp::DiscreteDistribution::setMedian ( bool  median) [pure virtual]

Sets the median value to true to say that the value in a class is proportional to the median value of the class, the proportionality factor being such that the sum of the values equals the expectation of the distribution. If it is set to false, the value is the mean value in the class.

If the median value is modified, the discretization process is launched.

Parameters:
mediantells how the value associated to each class is computed.

Implemented in bpp::AbstractDiscreteDistribution, bpp::MixtureOfDiscreteDistributions, and bpp::InvariantMixedDiscreteDistribution.

Referenced by bpp::BppODiscreteDistributionFormat::read(), and bpp::InvariantMixedDiscreteDistribution::setMedian().

virtual void bpp::Parametrizable::setNamespace ( const std::string &  prefix) [pure virtual, inherited]

Set the namespace for the parameter names.

Parameters:
prefixThe 'namespace', that is a prefix to add to all parameter names. If parameter names are already prefixed, the new prefix will be used instead.

Implemented in bpp::FunctionWrapper, bpp::ParametrizableAdapter, bpp::AbstractParameterAliasable, bpp::MixtureOfDiscreteDistributions, bpp::AbstractParametrizable, and bpp::InvariantMixedDiscreteDistribution.

Referenced by bpp::InvariantMixedDiscreteDistribution::InvariantMixedDiscreteDistribution(), bpp::InvariantMixedDiscreteDistribution::setNamespace(), and bpp::FunctionWrapper::setNamespace().

virtual void bpp::DiscreteDistribution::setNumberOfCategories ( size_t  nbClasses) [pure virtual]

sets the number of categories and discretizes if there is a change in this number.

Implemented in bpp::AbstractDiscreteDistribution, and bpp::MixtureOfDiscreteDistributions.

Referenced by bpp::InvariantMixedDiscreteDistribution::setNumberOfCategories().

virtual void bpp::Parametrizable::setParametersValues ( const ParameterList parameters) throw (ParameterNotFoundException, ConstraintException) [pure virtual, inherited]

Update the parameters from parameters.

parameters must be a subset of all parameters available.

Parameters:
parametersA list containing all parameters to update.
Exceptions:
ParameterNotFoundExceptionIf a some parameter in params is not in the list.
ConstraintExceptionIf a value in parameters does not match the constraint in the corresponding parameter in the list.

Implemented in bpp::InfinityFunctionWrapper, bpp::FunctionWrapper, bpp::AbstractNumericalDerivative, bpp::ParametrizableAdapter, and bpp::AbstractParametrizable.

Referenced by bpp::AbstractNumericalDerivative::setParametersValues(), bpp::FunctionWrapper::setParametersValues(), and bpp::InfinityFunctionWrapper::setParametersValues().

virtual void bpp::Parametrizable::setParameterValue ( const std::string &  name,
double  value 
) throw (ParameterNotFoundException, ConstraintException) [pure virtual, inherited]

Set the value of parameter with name name to be equal to value.

Parameters:
namethe name of the parameter to set.
valueThe value of the parameter.
Exceptions:
ParameterNotFoundExceptionIf no parameter in the list has the name name.
ConstraintExceptionIf value does not match the constraint associated to parameter name.

Implemented in bpp::InfinityFunctionWrapper, bpp::FunctionWrapper, bpp::AbstractNumericalDerivative, bpp::ParametrizableAdapter, and bpp::AbstractParametrizable.

Referenced by bpp::AbstractNumericalDerivative::setParameterValue(), bpp::FunctionWrapper::setParameterValue(), and bpp::InfinityFunctionWrapper::setParameterValue().

virtual bool bpp::DiscreteDistribution::strictLowerBound ( ) const [inline, virtual]
Returns:
The lowest value.

Reimplemented in bpp::AbstractDiscreteDistribution.

Definition at line 285 of file DiscreteDistribution.h.

Referenced by bpp::InvariantMixedDiscreteDistribution::updateDistribution().

virtual bool bpp::DiscreteDistribution::strictUpperBound ( ) const [inline, virtual]
Returns:
The highest value.

Reimplemented in bpp::AbstractDiscreteDistribution.

Definition at line 292 of file DiscreteDistribution.h.

Referenced by bpp::InvariantMixedDiscreteDistribution::updateDistribution().

virtual void bpp::ParameterAliasable::unaliasParameters ( const std::string &  p1,
const std::string &  p2 
) throw (ParameterNotFoundException, Exception) [pure virtual, inherited]

Detach two parameters previously set as 'aliased'.

The values of the two parameters will now be independent.

Parameters:
p1Original parameter.
p2Aliased parameter.
Exceptions:
ParameterNotFoundExceptionif p1 or p2 do not correspond to existing parameters.
Exceptionwhen trying to perform non-valid dissociation.

Implemented in bpp::AbstractParameterAliasable.


The documentation for this class was generated from the following file:
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