Convex quadratic benchmark function with single dominant axis. More...
#include <shark/ObjectiveFunctions/Benchmarks/Cigar.h>
Public Member Functions | |
Cigar (std::size_t numberOfVariables=5, double alpha=1.E-3) | |
std::string | name () const |
From INameable: return the class name. More... | |
std::size_t | numberOfVariables () const |
Accesses the number of variables. More... | |
bool | hasScalableDimensionality () const |
void | setNumberOfVariables (std::size_t numberOfVariables) |
Adjusts the number of variables if the function is scalable. More... | |
SearchPointType | proposeStartingPoint () const |
Proposes a starting point in the feasible search space of the function. More... | |
double | eval (const SearchPointType &p) const |
Evaluates the objective function for the supplied argument. More... | |
double | evalDerivative (SearchPointType const &p, FirstOrderDerivative &derivative) const |
Evaluates the objective function and calculates its gradient. More... | |
double | alpha () const |
void | setAlpha (double alpha) |
Public Member Functions inherited from shark::AbstractObjectiveFunction< RealVector, double > | |
const Features & | features () const |
virtual void | updateFeatures () |
bool | hasValue () const |
returns whether this function can calculate it's function value More... | |
bool | hasFirstDerivative () const |
returns whether this function can calculate the first derivative More... | |
bool | hasSecondDerivative () const |
returns whether this function can calculate the second derivative More... | |
bool | canProposeStartingPoint () const |
returns whether this function can propose a starting point. More... | |
bool | isConstrained () const |
returns whether this function can return More... | |
bool | hasConstraintHandler () const |
returns whether this function can return More... | |
bool | canProvideClosestFeasible () const |
Returns whether this function can calculate thee closest feasible to an infeasible point. More... | |
bool | isThreadSafe () const |
Returns true, when the function can be usd in parallel threads. More... | |
bool | isNoisy () const |
Returns true, when the function can be usd in parallel threads. More... | |
AbstractObjectiveFunction () | |
Default ctor. More... | |
virtual | ~AbstractObjectiveFunction () |
Virtual destructor. More... | |
virtual void | init () |
void | setRng (random::rng_type *rng) |
Sets the Rng used by the objective function. More... | |
virtual std::size_t | numberOfObjectives () const |
virtual bool | hasScalableObjectives () const |
virtual void | setNumberOfObjectives (std::size_t numberOfObjectives) |
Adjusts the number of objectives if the function is scalable. More... | |
std::size_t | evaluationCounter () const |
Accesses the evaluation counter of the function. More... | |
AbstractConstraintHandler< SearchPointType > const & | getConstraintHandler () const |
Returns the constraint handler of the function if it has one. More... | |
virtual bool | isFeasible (const SearchPointType &input) const |
Tests whether a point in SearchSpace is feasible, e.g., whether the constraints are fulfilled. More... | |
virtual void | closestFeasible (SearchPointType &input) const |
If supported, the supplied point is repaired such that it satisfies all of the function's constraints. More... | |
ResultType | operator() (SearchPointType const &input) const |
Evaluates the function. Useful together with STL-Algorithms like std::transform. More... | |
virtual ResultType | evalDerivative (SearchPointType const &input, SecondOrderDerivative &derivative) const |
Evaluates the objective function and calculates its gradient. More... | |
Public Member Functions inherited from shark::INameable | |
virtual | ~INameable () |
Additional Inherited Members | |
Public Types inherited from shark::AbstractObjectiveFunction< RealVector, double > | |
enum | Feature |
List of features that are supported by an implementation. More... | |
typedef RealVector | SearchPointType |
typedef double | ResultType |
typedef boost::mpl::if_< std::is_arithmetic< double >, SearchPointType, RealMatrix >::type | FirstOrderDerivative |
typedef TypedFlags< Feature > | Features |
This statement declares the member m_features. See Core/Flags.h for details. More... | |
typedef TypedFeatureNotAvailableException< Feature > | FeatureNotAvailableException |
Protected Member Functions inherited from shark::AbstractObjectiveFunction< RealVector, double > | |
void | announceConstraintHandler (AbstractConstraintHandler< SearchPointType > const *handler) |
helper function which is called to announce the presence of an constraint handler. More... | |
Protected Attributes inherited from shark::AbstractObjectiveFunction< RealVector, double > | |
Features | m_features |
std::size_t | m_evaluationCounter |
Evaluation counter, default value: 0. More... | |
AbstractConstraintHandler< SearchPointType > const * | m_constraintHandler |
random::rng_type * | mep_rng |
Convex quadratic benchmark function with single dominant axis.
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inline |
Definition at line 44 of file Cigar.h.
References shark::AbstractObjectiveFunction< RealVector, double >::CAN_PROPOSE_STARTING_POINT, shark::AbstractObjectiveFunction< RealVector, double >::HAS_FIRST_DERIVATIVE, shark::AbstractObjectiveFunction< RealVector, double >::m_features, and numberOfVariables().
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inline |
Definition at line 91 of file Cigar.h.
Referenced by setAlpha().
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inlinevirtual |
Evaluates the objective function for the supplied argument.
[in] | input | The argument for which the function shall be evaluated. |
FeatureNotAvailableException | in the default implementation and if a function does not support this feature. |
Reimplemented from shark::AbstractObjectiveFunction< RealVector, double >.
Definition at line 75 of file Cigar.h.
References shark::AbstractObjectiveFunction< RealVector, double >::m_evaluationCounter.
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inlinevirtual |
Evaluates the objective function and calculates its gradient.
[in] | input | The argument to eval the function for. |
[out] | derivative | The derivate is placed here. |
FeatureNotAvailableException | in the default implementation and if a function does not support this feature. |
Reimplemented from shark::AbstractObjectiveFunction< RealVector, double >.
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inlinevirtual |
Reimplemented from shark::AbstractObjectiveFunction< RealVector, double >.
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inlinevirtual |
From INameable: return the class name.
Reimplemented from shark::INameable.
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inlinevirtual |
Accesses the number of variables.
Implements shark::AbstractObjectiveFunction< RealVector, double >.
Definition at line 54 of file Cigar.h.
Referenced by Cigar(), proposeStartingPoint(), and setNumberOfVariables().
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inlinevirtual |
Proposes a starting point in the feasible search space of the function.
FeatureNotAvailableException | in the default implementation and if a function does not support this feature. |
Reimplemented from shark::AbstractObjectiveFunction< RealVector, double >.
Definition at line 66 of file Cigar.h.
References shark::AbstractObjectiveFunction< RealVector, double >::mep_rng, numberOfVariables(), and shark::random::uni().
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inline |
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inlinevirtual |
Adjusts the number of variables if the function is scalable.
[in] | numberOfVariables | The new dimension. |
Reimplemented from shark::AbstractObjectiveFunction< RealVector, double >.
Definition at line 62 of file Cigar.h.
References numberOfVariables().