BlendedStep

class BlendedStep(*args)

Blended step.

Available constructors:
BlendedStep(epsilon, eta=1.0)
Parameters:

epsilon : sequence of float

Finite difference step factors for each dimension.

eta : positive float, sequence of positive float with the same dimension as epsilon

Finite difference step offsets for each dimension.

See also

ConstantStep

Notes

BlendedStep defines a list of finite difference steps equal to: epsilon (|x| + eta).

Examples

>>> import openturns as ot
>>> epsilon = [1e-4, 2e-4]
>>> x = [2.0]*2
>>> steps = ot.BlendedStep(epsilon)
>>> print(steps(x))
[0.0003,0.0006]
>>> steps = ot.BlendedStep(epsilon, 0.0)
>>> print(steps(x))
[0.0002,0.0004]
>>> steps = ot.BlendedStep(epsilon, [1.0, 2.0])
>>> print(steps(x))
[0.0003,0.0008]
>>> steps = ot.BlendedStep(epsilon, 2.0)
>>> print(steps(x))
[0.0004,0.0008]

Methods

__call__(…) <==> x(…)
getClassName() Accessor to the object’s name.
getEpsilon() Get the finite difference steps.
getEta() Get the finite difference step offsets.
getId() Accessor to the object’s id.
getName() Accessor to the object’s name.
getShadowedId() Accessor to the object’s shadowed id.
getVisibility() Accessor to the object’s visibility state.
hasName() Test if the object is named.
hasVisibleName() Test if the object has a distinguishable name.
setEpsilon(epsilon) Set the finite difference steps.
setEta(eta) Set the finite difference step offsets.
setName(name) Accessor to the object’s name.
setShadowedId(id) Accessor to the object’s shadowed id.
setVisibility(visible) Accessor to the object’s visibility state.
__init__(*args)

x.__init__(…) initializes x; see help(type(x)) for signature

getClassName()

Accessor to the object’s name.

Returns:

class_name : str

The object class name (object.__class__.__name__).

getEpsilon()

Get the finite difference steps.

Returns:

epsilon : Point

If ConstantStep : Finite difference steps for each dimension.

If BlendedStep : Finite difference step factors for each dimension.

getEta()

Get the finite difference step offsets.

Returns:

eta : Point

Finite difference step offsets for each dimension.

getId()

Accessor to the object’s id.

Returns:

id : int

Internal unique identifier.

getName()

Accessor to the object’s name.

Returns:

name : str

The name of the object.

getShadowedId()

Accessor to the object’s shadowed id.

Returns:

id : int

Internal unique identifier.

getVisibility()

Accessor to the object’s visibility state.

Returns:

visible : bool

Visibility flag.

hasName()

Test if the object is named.

Returns:

hasName : bool

True if the name is not empty.

hasVisibleName()

Test if the object has a distinguishable name.

Returns:

hasVisibleName : bool

True if the name is not empty and not the default one.

setEpsilon(epsilon)

Set the finite difference steps.

Parameters:

epsilon : sequence of float

If ConstantStep : Finite difference steps for each dimension.

If BlendedStep : Finite difference step factors for each dimension.

setEta(eta)

Set the finite difference step offsets.

Parameters:

eta : sequence of positive float

Finite difference step offsets for each dimension.

setName(name)

Accessor to the object’s name.

Parameters:

name : str

The name of the object.

setShadowedId(id)

Accessor to the object’s shadowed id.

Parameters:

id : int

Internal unique identifier.

setVisibility(visible)

Accessor to the object’s visibility state.

Parameters:

visible : bool

Visibility flag.