mlr_pipeops_fda.zoom: Zoom In/Out on Functional Columns

In mlr3fda: Extending 'mlr3' to Functional Data Analysis

Zoom In/Out on Functional Columns

Description

Zoom in or out on functional features by restricting their domain to a specified window. This operation extracts a subset of each function by defining new lower and upper boundaries, effectively cropping the functional data to focus on a specific region of interest. Calls tf::tf_zoom() from package tf.

Parameters

The parameters are the parameters inherited from PipeOpTaskPreprocSimple, as well as the following parameters:

• begin :: numeric()
  The lower limit of the domain. Can be a single value applied to all functional columns, or a numeric of length equal to the number of observations. The window includes all values where argument >= begin. If not specified, defaults to the lower limit of each function's domain.

• end :: numeric()
  The upper limit of the domain.

Super classes

mlr3pipelines::PipeOp -> mlr3pipelines::PipeOpTaskPreproc -> mlr3pipelines::PipeOpTaskPreprocSimple -> PipeOpFDAZoom

Methods

Public methods

• PipeOpFDAZoom$new()

• PipeOpFDAZoom$clone()

Inherited methods

• mlr3pipelines::PipeOp$help()
• mlr3pipelines::PipeOp$predict()
• mlr3pipelines::PipeOp$print()
• mlr3pipelines::PipeOp$train()

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Method new()

Initializes a new instance of this Class.

Usage

PipeOpFDAZoom$new(id = "fda.zoom", param_vals = list())

Arguments

id

(character(1))
Identifier of resulting object, default "fda.zoom".

param_vals

(named list())
List of hyperparameter settings, overwriting the hyperparameter settings that would otherwise be set during construction. Default list().

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Method clone()

The objects of this class are cloneable with this method.

Usage

PipeOpFDAZoom$clone(deep = FALSE)

Arguments

deep

Whether to make a deep clone.

Examples

task = tsk("fuel")
pop = po("fda.zoom", begin = 50, end = 100)
task_zoom = pop$train(list(task))[[1L]]
task_zoom$data()

mlr3fda documentation built on March 31, 2026, 1:06 a.m.