as_task_regr {mlr3}

Convert to a Regression Task

Description

Convert object to a TaskRegr. This is a S3 generic. mlr3 ships with methods for the following objects:

1. TaskRegr: ensure the identity

2. formula, data.frame(), matrix(), Matrix::Matrix() and DataBackend: provides an alternative to the constructor of TaskRegr.

3. TaskClassif: Calls convert_task().

Usage

as_task_regr(x, ...)

## S3 method for class 'TaskRegr'
as_task_regr(x, clone = FALSE, ...)

## S3 method for class 'data.frame'
as_task_regr(
  x,
  target = NULL,
  id = deparse1(substitute(x)),
  label = NA_character_,
  ...
)

## S3 method for class 'matrix'
as_task_regr(
  x,
  target = NULL,
  id = deparse1(substitute(x)),
  label = NA_character_,
  ...
)

## S3 method for class 'Matrix'
as_task_regr(
  x,
  target = NULL,
  id = deparse1(substitute(x)),
  label = NA_character_,
  ...
)

## S3 method for class 'DataBackend'
as_task_regr(
  x,
  target = NULL,
  id = deparse1(substitute(x)),
  label = NA_character_,
  ...
)

## S3 method for class 'TaskClassif'
as_task_regr(
  x,
  target = NULL,
  drop_original_target = FALSE,
  drop_levels = TRUE,
  ...
)

## S3 method for class 'formula'
as_task_regr(
  x,
  data,
  id = deparse1(substitute(data)),
  label = NA_character_,
  ...
)

Arguments

x

(any)
Object to convert.

...

(any)
Additional arguments.

clone

(logical(1))
If TRUE, ensures that the returned object is not the same as the input x.

target

(character(1))
Name of the target column.

id

(character(1))
Id for the new task. Defaults to the (deparsed and substituted) name of the data argument.

label

(character(1))
Label for the new instance.

drop_original_target

(logical(1))
If FALSE (default), the original target is added as a feature. Otherwise the original target is dropped.

drop_levels

(logical(1))
If TRUE (default), unused levels of the new target variable are dropped.

data

(data.frame())
Data frame containing all columns referenced in formula x.

Value

TaskRegr.

Examples

as_task_regr(datasets::mtcars, target = "mpg")