This is the abstract base class for unsupervised tasks such as cluster tasks in mlr3cluster and mlr3spatial.
See also
Chapter in the mlr3book: https://mlr3book.mlr-org.com/chapters/chapter2/data_and_basic_modeling.html
Package mlr3data for more toy tasks.
Package mlr3oml for downloading tasks from https://www.openml.org.
Package mlr3viz for some generic visualizations.
Dictionary of Tasks: mlr_tasks
as.data.table(mlr_tasks)
for a table of available Tasks in the running session (depending on the loaded packages).mlr3fselect and mlr3filters for feature selection and feature filtering.
Extension packages for additional task types:
Unsupervised clustering: mlr3cluster
Probabilistic supervised regression and survival analysis: https://mlr3proba.mlr-org.com/.
Other Task:
Task
,
TaskClassif
,
TaskRegr
,
TaskSupervised
,
mlr_tasks
,
mlr_tasks_boston_housing
,
mlr_tasks_breast_cancer
,
mlr_tasks_german_credit
,
mlr_tasks_iris
,
mlr_tasks_mtcars
,
mlr_tasks_penguins
,
mlr_tasks_pima
,
mlr_tasks_sonar
,
mlr_tasks_spam
,
mlr_tasks_wine
,
mlr_tasks_zoo
Super class
mlr3::Task
-> TaskUnsupervised
Methods
Inherited methods
mlr3::Task$add_strata()
mlr3::Task$cbind()
mlr3::Task$data()
mlr3::Task$divide()
mlr3::Task$droplevels()
mlr3::Task$filter()
mlr3::Task$format()
mlr3::Task$formula()
mlr3::Task$head()
mlr3::Task$help()
mlr3::Task$levels()
mlr3::Task$missings()
mlr3::Task$print()
mlr3::Task$rbind()
mlr3::Task$rename()
mlr3::Task$select()
mlr3::Task$set_col_roles()
mlr3::Task$set_levels()
mlr3::Task$set_row_roles()
Method new()
Creates a new instance of this R6 class.
Usage
TaskUnsupervised$new(
id,
task_type = "unsupervised",
backend,
label = NA_character_,
extra_args = list()
)
Arguments
id
(
character(1)
)
Identifier for the new instance.task_type
(
character(1)
)
Type of task, e.g."regr"
or"classif"
. Must be an element of mlr_reflections$task_types$type.backend
(DataBackend)
Either a DataBackend, or any object which is convertible to a DataBackend withas_data_backend()
. E.g., adata.frame()
will be converted to a DataBackendDataTable.label
(
character(1)
)
Label for the new instance.extra_args
(named
list()
)
Named list of constructor arguments, required for converting task types viaconvert_task()
.
Examples
TaskUnsupervised$new("penguins", task_type = "regr", backend = palmerpenguins::penguins)
#> <TaskUnsupervised:penguins> (344 x 8)
#> * Target: -
#> * Properties: -
#> * Features (8):
#> - int (3): body_mass_g, flipper_length_mm, year
#> - fct (3): island, sex, species
#> - dbl (2): bill_depth_mm, bill_length_mm