Bayesian Filtering Library Generated from SVN r
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Class representing a mixture of PDFs, the mixture can contain different. More...
#include <mixture.h>
Public Member Functions | |
Mixture (const unsigned int dimension=0) | |
Constructor: An equal weight is set for all components. | |
template<typename U > | |
Mixture (const U &componentVector) | |
Constructor: An equal weights is set for all components. | |
Mixture (const Mixture &my_mixture) | |
Copy Constructor. | |
virtual | ~Mixture () |
Destructor. | |
virtual Mixture * | Clone () const |
Clone function. | |
unsigned int | NumComponentsGet () const |
Get the number of components. | |
Probability | ProbabilityGet (const T &state) const |
Implementation of virtual base class method. | |
bool | SampleFrom (vector< Sample< T > > &list_samples, const unsigned int num_samples, const SampleMthd method=SampleMthd::DEFAULT, void *args=NULL) const |
Draw multiple samples from the Pdf (overloaded) | |
bool | SampleFrom (Sample< T > &one_sample, const SampleMthd method=SampleMthd::DEFAULT, void *args=NULL) const |
Draw 1 sample from the Pdf: | |
T | ExpectedValueGet () const |
Get the expected value E[x] of the pdf. | |
MatrixWrapper::SymmetricMatrix | CovarianceGet () const |
Get the Covariance Matrix E[(x - E[x])^2] of the Analytic pdf. | |
vector< Probability > | WeightsGet () const |
Get all component weights. | |
Probability | WeightGet (unsigned int componentNumber) const |
Get the component weight of component "componentNumber". | |
bool | WeightsSet (vector< Probability > &weights) |
Set all component weights. | |
bool | WeightSet (unsigned int componentNumber, Probability w) |
Function to change/set the weigth of a single component. | |
int | MostProbableComponentGet () const |
Get the index of the most probable component, if a few component are. | |
bool | AddComponent (Pdf< T > &pdf) |
Add a component pdf: THIS IS A NON-REALTIME OPERATION. | |
bool | AddComponent (Pdf< T > &pdf, Probability w) |
Add a component pdf with weight w: THIS IS A NON-REALTIME OPERATION. | |
bool | DeleteComponent (unsigned int componentNumber) |
Delete a component pdf: THIS IS A NON_REALTIME OPERATION. | |
vector< Pdf< T > * > | ComponentsGet () const |
Get the vector of pointers to the component pdfs. | |
Pdf< T > * | ComponentGet (unsigned int componentNumber) const |
Get the pointer to the component pdf of component "componentNumber". | |
unsigned int | DimensionGet () const |
Get the dimension of the argument. | |
virtual void | DimensionSet (unsigned int dim) |
Set the dimension of the argument. | |
Protected Member Functions | |
bool | NormalizeWeights () |
Normalize the component weigths (eg. after setting a component weight) | |
bool | CumWeightsUpdate () |
Updates the cumWeights. | |
void | TestNotInit () const |
Called when a the number of components=0 and if method is called which. | |
Protected Attributes | |
unsigned int | _numComponents |
The number of components. | |
vector< Probability > * | _componentWeights |
Pointer to the vector of mixture weights, the sum of the elements = 1. | |
vector< Pdf< T > * > * | _componentPdfs |
Pointer to the vector of component pdfs. | |
vector< double > | _cumWeights |
Vector containing the cumulative component weights (for efficient sampling) | |
Class representing a mixture of PDFs, the mixture can contain different.
This class is an instantation from the template class Pdf, with added methods to get a set the individual components and mixture weights
Mixture | ( | const unsigned int | dimension = 0 | ) |
Constructor: An equal weight is set for all components.
dimension | the dimension of the state space |
Definition at line 182 of file mixture.h.
References Mixture< T >::_componentPdfs, Mixture< T >::_componentWeights, and Mixture< T >::NumComponentsGet().
Constructor: An equal weights is set for all components.
componentVector | vector of components (Pdf<T>*) |
Definition at line 199 of file mixture.h.
References Mixture< T >::_componentPdfs, Mixture< T >::_componentWeights, Mixture< T >::_cumWeights, Mixture< T >::Clone(), Mixture< T >::CumWeightsUpdate(), and Mixture< T >::NumComponentsGet().
Copy Constructor.
Definition at line 226 of file mixture.h.
References Mixture< T >::_componentPdfs, Mixture< T >::_componentWeights, Mixture< T >::_cumWeights, Mixture< T >::Clone(), Mixture< T >::ComponentGet(), Mixture< T >::CumWeightsUpdate(), Mixture< T >::NumComponentsGet(), and Mixture< T >::WeightsGet().
bool AddComponent | ( | Pdf< T > & | ) |
Add a component pdf: THIS IS A NON-REALTIME OPERATION.
Component pdf which will be added |
Definition at line 467 of file mixture.h.
References Pdf< T >::Clone().
bool AddComponent | ( | Pdf< T > & | pdf, |
Probability | w | ||
) |
Add a component pdf with weight w: THIS IS A NON-REALTIME OPERATION.
Component pdf which will be added | |
weight | the weight of the new component |
Definition at line 487 of file mixture.h.
References Pdf< T >::Clone().
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virtual |
Clone function.
Implements Pdf< T >.
Definition at line 262 of file mixture.h.
Referenced by Mixture< T >::Mixture(), and Mixture< T >::Mixture().
Pdf< T > * ComponentGet | ( | unsigned int | componentNumber | ) | const |
Get the pointer to the component pdf of component "componentNumber".
componentNumber | number of the component (must be >=0 and <_numComponents) |
Definition at line 540 of file mixture.h.
Referenced by Mixture< T >::Mixture().
vector< Pdf< T > * > ComponentsGet | ( | ) | const |
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Get the Covariance Matrix E[(x - E[x])^2] of the Analytic pdf.
Get first order statistic (Covariance) of this AnalyticPdf
Reimplemented from Pdf< T >.
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Updates the cumWeights.
Definition at line 577 of file mixture.h.
Referenced by Mixture< T >::Mixture(), and Mixture< T >::Mixture().
bool DeleteComponent | ( | unsigned int | componentNumber | ) |
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virtualinherited |
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Get the expected value E[x] of the pdf.
Get low order statistic (Expected Value) of this AnalyticPdf
Reimplemented from Pdf< T >.
int MostProbableComponentGet | ( | ) | const |
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unsigned int NumComponentsGet | ( | ) | const |
Get the number of components.
Definition at line 268 of file mixture.h.
Referenced by Mixture< T >::Mixture(), Mixture< T >::Mixture(), and Mixture< T >::Mixture().
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virtual |
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Draw 1 sample from the Pdf:
There's no need to create a list for only 1 sample!
one_sample | sample that will contain result of sampling |
method | Sampling method to be used. Each sampling method is currently represented by an enum, eg. SampleMthd::BOXMULLER |
args | Pointer to a struct representing extra sample arguments |
Reimplemented from Pdf< T >.
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Draw multiple samples from the Pdf (overloaded)
list_samples | list of samples that will contain result of sampling |
num_samples | Number of Samples to be drawn (iid) |
method | Sampling method to be used. Each sampling method is currently represented by an enum eg. SampleMthd::BOXMULLER |
args | Pointer to a struct representing extra sample arguments. "Sample Arguments" can be anything (the number of steps a gibbs-iterator should take, the interval width in MCMC, ... (or nothing), so it is hard to give a meaning to what exactly Sample Arguments should represent... |
Reimplemented from Pdf< T >.
Definition at line 286 of file mixture.h.
References Pdf< T >::SampleFrom().
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Probability WeightGet | ( | unsigned int | componentNumber | ) | const |
bool WeightSet | ( | unsigned int | componentNumber, |
Probability | w | ||
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Function to change/set the weigth of a single component.
Changes the component weights such that AFTER normalization the weight of the component "componentNumber" is equal to the weight w
componentNumber | number of the component of which the weight will be set (must be >=0 and <_numComponents) |
w | Probability to which the weight of component "componentNumber" will be set (must be <= 1) |
vector< Probability > WeightsGet | ( | ) | const |
Get all component weights.
Definition at line 390 of file mixture.h.
Referenced by Mixture< T >::Mixture().
bool WeightsSet | ( | vector< Probability > & | weights | ) |
Set all component weights.
@weights values vector<Probability> containing the new component weights . The sum of the probabilities of this list is not required to be one since the normalization is automatically carried out. The size of weights should be equal to the number of components
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Pointer to the vector of component pdfs.
Definition at line 58 of file mixture.h.
Referenced by Mixture< T >::Mixture(), Mixture< T >::Mixture(), and Mixture< T >::Mixture().
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Pointer to the vector of mixture weights, the sum of the elements = 1.
Definition at line 55 of file mixture.h.
Referenced by Mixture< T >::Mixture(), Mixture< T >::Mixture(), and Mixture< T >::Mixture().
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Vector containing the cumulative component weights (for efficient sampling)
Definition at line 66 of file mixture.h.
Referenced by Mixture< T >::Mixture(), and Mixture< T >::Mixture().
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