Fixes factors of type factor
, ordered
: Makes sure the factor levels
during prediction are the same as during training; possibly dropping empty
training factor levels before.
Note this may introduce missing values during prediction if unseen factor levels are found.
R6Class
object inheriting from PipeOpTaskPreprocSimple
/PipeOpTaskPreproc
/PipeOp
.
PipeOpFixFactors$new(id = "fixfactors", param_vals = list())
id
:: character(1)
Identifier of resulting object, default "fixfactors"
.
param_vals
:: named list
List of hyperparameter settings, overwriting the hyperparameter settings that would otherwise be set during construction. Default list()
.
Input and output channels are inherited from PipeOpTaskPreproc
.
The output is the input Task
with all affected factor
and ordered
feature levels fixed.
The $state
is a named list
with the $state
elements inherited from PipeOpTaskPreproc
, as well as:
levels
:: named list
of character
List of factor levels of each affected factor
or ordered
feature that will be fixed.
The parameters are the parameters inherited from PipeOpTaskPreproc
, as well as:
droplevels
:: logical(1)
Whether to drop empty factor levels of the training task. Default TRUE
Changes factor levels of columns and attaches them with a new data.table
backend and the virtual cbind()
backend.
Only methods inherited from PipeOpTaskPreprocSimple
/PipeOpTaskPreproc
/PipeOp
.
Other PipeOps: PipeOpEnsemble
,
PipeOpImpute
,
PipeOpTaskPreproc
, PipeOp
,
mlr_pipeops_boxcox
,
mlr_pipeops_branch
,
mlr_pipeops_chunk
,
mlr_pipeops_classbalancing
,
mlr_pipeops_classifavg
,
mlr_pipeops_classweights
,
mlr_pipeops_colapply
,
mlr_pipeops_collapsefactors
,
mlr_pipeops_copy
,
mlr_pipeops_encodeimpact
,
mlr_pipeops_encodelmer
,
mlr_pipeops_encode
,
mlr_pipeops_featureunion
,
mlr_pipeops_filter
,
mlr_pipeops_histbin
,
mlr_pipeops_ica
,
mlr_pipeops_imputehist
,
mlr_pipeops_imputemean
,
mlr_pipeops_imputemedian
,
mlr_pipeops_imputenewlvl
,
mlr_pipeops_imputesample
,
mlr_pipeops_kernelpca
,
mlr_pipeops_learner
,
mlr_pipeops_missind
,
mlr_pipeops_modelmatrix
,
mlr_pipeops_mutate
,
mlr_pipeops_nop
,
mlr_pipeops_pca
,
mlr_pipeops_quantilebin
,
mlr_pipeops_regravg
,
mlr_pipeops_removeconstants
,
mlr_pipeops_scalemaxabs
,
mlr_pipeops_scalerange
,
mlr_pipeops_scale
,
mlr_pipeops_select
,
mlr_pipeops_smote
,
mlr_pipeops_spatialsign
,
mlr_pipeops_subsample
,
mlr_pipeops_unbranch
,
mlr_pipeops_yeojohnson
,
mlr_pipeops
# NOT RUN {
library("mlr3")
# }
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