Transformation {rearrr}

Transformation

Description

Container for the type of transformation used in Pipeline.

Note: For internal use.

Public fields

name

Name of transformation.

fn

Transformation function.

args

list of arguments for `fn`.

group_cols

Names of columns to group data.frame by before applying `fn`.

When `NULL`, the data.frame is not grouped.

Methods

Public methods

• Transformation$new()

• Transformation$apply()

• Transformation$print()

• Transformation$clone()

Method new()

Initialize transformation.

Usage

Transformation$new(fn, args, name = NULL, group_cols = NULL)

Arguments

fn

Transformation function.

args

list of arguments for `fn`.

name

Name of transformation.

group_cols

Names of columns to group data.frame by before applying `fn`.

When `NULL`, the data.frame is not grouped.

Method apply()

Apply the transformation to a data.frame.

Usage

Transformation$apply(data)

Arguments

data

data.frame.

A grouped data.frame will first be ungrouped. If `group_cols` is specified, it will then be grouped by those columns.

Returns

Transformed version of `data`.

Method print()

Print an overview of the transformation.

Usage

Transformation$print(..., indent = 0, show_class = TRUE)

Arguments

...

further arguments passed to or from other methods.

indent

How many spaces to indent when printing.

show_class

Whether to print the transformation class name.

Returns

The pipeline. To allow chaining of methods.

Method clone()

The objects of this class are cloneable with this method.

Usage

Transformation$clone(deep = FALSE)

Arguments

deep

Whether to make a deep clone.

Author(s)

Ludvig Renbo Olsen, [e-mail]

See Also

Other transformation classes: FixedGroupsTransformation, GeneratedTransformation