Parent class for PipeOps that transform Task and Prediction objects to different types.
State
The $state
is left empty (list()
).
Internals
The commonality of methods using PipeOpTransformer is that they take a Task or Prediction of one type (e.g. regr or classif) and transform it to another type.
See also
Other PipeOps:
PipeOpPredTransformer
,
PipeOpTaskTransformer
,
mlr_pipeops_survavg
,
mlr_pipeops_trafopred_classifsurv_disctime
,
mlr_pipeops_trafopred_regrsurv
,
mlr_pipeops_trafopred_survregr
,
mlr_pipeops_trafotask_regrsurv
,
mlr_pipeops_trafotask_survclassif_disctime
,
mlr_pipeops_trafotask_survregr
Other Transformers:
PipeOpPredTransformer
,
PipeOpTaskTransformer
Super class
mlr3pipelines::PipeOp
-> PipeOpTransformer
Methods
Method new()
Creates a new instance of this R6 class.
Usage
PipeOpTransformer$new(
id,
param_set = ps(),
param_vals = list(),
packages = character(),
input = data.table(),
output = data.table()
)
Arguments
id
(
character(1)
)
Identifier of the resulting object.param_set
(paradox::ParamSet)
Set of hyperparameters.param_vals
(
list()
)
List of hyperparameter settings, overwriting the hyperparameter settings that would otherwise be set during construction.packages
(
character()
)
Set of required packages. A warning is signaled by the constructor if at least one of the packages is not installed, but loaded (not attached) later on-demand viarequireNamespace()
.input
data.table::data.table
data.table
with columnsname
(character
),train
(character
),predict
(character
). Sets the$input
slot, see PipeOp.output
data.table::data.table
data.table
with columnsname
(character
),train
(character
),predict
(character
). Sets the$output
slot, see PipeOp.