fft_approx class

Namespace: Ans.DataProcessing.operators.math

Summary

Computes the fitting curve using FFT filtering and cubic fitting in space (node i: x=time, y=data), with the possibility to compute the first and the second derivatives of the curve.

available inputs: time_scoping (IList int, Scoping, System.Collections.IEnumerable) (optional), mesh_scoping (Scoping, ScopingsContainer) (optional), entity_to_fit (FieldsContainer), component_number (Int32), first_derivative (bool), second_derivative (bool), fit_data (bool), cutoff_fr (double, Int32) (optional)

available outputs: fitted_entity_y (FieldsContainer), first_der_dy (FieldsContainer), second_der_d2y (FieldsContainer)

Example

op = fft_approx()

op = fft_approx(time_scoping=my_time_scoping,mesh_scoping=my_mesh_scoping,entity_to_fit=my_entity_to_fit,component_number=my_component_number,first_derivative=my_first_derivative,second_derivative=my_second_derivative,fit_data=my_fit_data,cutoff_fr=my_cutoff_fr)

Class Information

Property	Value
Namespace	Ans.DataProcessing.operators.math
Assembly	Ans_Dpf_Math_dll_cs
Base Class	Ans.DataProcessing.internal_objects.BaseOperator

Inputs

time_scoping

A time scoping to rescope / split the fields container given as input.

Type: LinkableInput

mesh_scoping

A space (mesh entities) scoping (or scopings container) to rescope / split the fields container given as input.

Type: LinkableInput

entity_to_fit

Data changing in time to be fitted.

Type: LinkableInput

component_number

Component number as an integer, for example '0' for X-displacement, '1' for Y-displacement, and so on.

Type: LinkableInput

first_derivative

Calculate the first derivative (bool). The default is false.

Type: LinkableInput

second_derivative

Calculate the second derivative (bool). The default is false.

Type: LinkableInput

fit_data

Calculate the fitted values (bool). The default is false

Type: LinkableInput

cutoff_fr

Cutoff frequency.

Type: LinkableInput

Outputs

fitted_entity_y

The fitted entity is fitted using FFT along the space scoping (node i: x=time, y=data). Fitted Y is expected to be close to the input data.

Type: LinkableOutput

first_der_dy

The first derivative (dY) from the fitted Y.

Type: LinkableOutput

second_der_d2y

The second derivative (d2Y) from the fitted Y.

Type: LinkableOutput

Constructors

Constructor

fft_approx()

Constructor

fft_approx(time_scoping, mesh_scoping, entity_to_fit, component_number, first_derivative, second_derivative, fit_data, cutoff_fr, config)

Parameters:

• time_scoping (object)
• mesh_scoping (object)
• entity_to_fit (object)
• component_number (object)
• first_derivative (object)
• second_derivative (object)
• fit_data (object)
• cutoff_fr (object)
• config (OperatorConfig)

Constructor

fft_approx(config)

Parameters:

• config (OperatorConfig)

Methods

Properties

inputs

Type: InputSpec

# Get or set the property
value = obj.inputs
obj.inputs = new_value

outputs

Type: OutputSpec

# Get or set the property
value = obj.outputs
obj.outputs = new_value

defaultConfig

Type: Config

# Get the property (read-only)
value = obj.defaultConfig