# RootStrategy¶

class RootStrategy(*args)

Base class for root strategies.

RootStrategy is used through its derived classes:

Methods

 getClassName() Accessor to the object’s name. getId() Accessor to the object’s id. getImplementation(*args) Accessor to the underlying implementation. getMaximumDistance() Get the maximum distance. getName() Accessor to the object’s name. getOriginValue() Get the origin value. getSolver() Get the solver. getStepSize() Get the step size. setMaximumDistance(maximumDistance) Set the maximum distance. setName(name) Accessor to the object’s name. setOriginValue(originValue) Set the origin value. setSolver(solver) Set the solver. setStepSize(stepSize) Set the step size. solve(function, value) Give all the roots found applying the root strategy.
__init__(*args)

Initialize self. See help(type(self)) for accurate signature.

getClassName()

Accessor to the object’s name.

Returns: class_name : str The object class name (object.__class__.__name__).
getId()

Accessor to the object’s id.

Returns: id : int Internal unique identifier.
getImplementation(*args)

Accessor to the underlying implementation.

Returns: impl : Implementation The implementation class.
getMaximumDistance()

Get the maximum distance.

Returns: maximumDistance : positive float Distance from the center of the standard space until which we research an intersection with the limit state function along each direction. By default, the maximum distance is equal to the value defined through the key RootStrategyImplementation-DefaultMaximumDistance of the ResourceMap.
getName()

Accessor to the object’s name.

Returns: name : str The name of the object.
getOriginValue()

Get the origin value.

Returns: origin : float Value of the limit state function at the center of the standard space.
getSolver()

Get the solver.

Returns: solver : Solver Non linear solver which will research the root in a segment.
getStepSize()

Get the step size.

Returns: stepSize : float Length of each segment inside which the root research is performed. By default, the step size is equal to the value defined through the key RootStrategyImplementation-DefaultStepSize of the ResourceMap.
setMaximumDistance(maximumDistance)

Set the maximum distance.

Parameters: maximumDistance : positive float Distance from the center of the standard space until which we research an intersection with the limit state function along each direction. By default, the maximum distance is equal to the value defined through the key RootStrategyImplementation-DefaultMaximumDistance of the ResourceMap.
setName(name)

Accessor to the object’s name.

Parameters: name : str The name of the object.
setOriginValue(originValue)

Set the origin value.

Parameters: origin : float Value of the limit state function at the center of the standard space.
setSolver(solver)

Set the solver.

Parameters: solver : Solver Non linear solver which will research the root in a segment.
setStepSize(stepSize)

Set the step size.

Parameters: stepSize : float Length of each segment inside which the root research is performed. By default, the step size is equal to the value defined through the key RootStrategyImplementation-DefaultStepSize of the ResourceMap.
solve(function, value)

Give all the roots found applying the root strategy.

Parameters: function : Function Function from to along the ray, a linear function along the direction. value : float roots : ScalarCollection All the roots found applying the root strategy. If SafeAndSlow: all the real values such as function(x) = value researched in each segment of length stepSize, within [origin, maximumDistance]. If RiskyAndFast: the real value such as function(x) = value researched within [origin, maximumDistance]. If MediumSafe: the real value such as function(x) = value researched the first segment of length stepSize, within [origin, maximumDistance] where a sign changement of function has been detected.