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A simple Dictionary storing objects of class Graph. The dictionary contains a collection of often-used graph structures, and it's aim is solely to make often-used functions more accessible. Each Graph has an associated help page, which can be accessed via ?mlr_graphs_<key>, i.e. ?mlr_graphs_bagging.


R6Class object inheriting from mlr3misc::Dictionary.


Methods inherited from Dictionary, as well as:

  • add(key, value)
    (character(1), function)
    Adds constructor value to the dictionary with key key, potentially overwriting a previously stored item.

S3 methods

See also


lrn = lrn("regr.rpart")
task = mlr_tasks$get("boston_housing")

# Robustify the learner for the task.
gr = pipeline_robustify(task, lrn) %>>% po("learner", lrn)
# or equivalently
gr = mlr_graphs$get("robustify", task = task, learner = lrn) %>>% po(lrn)
# or equivalently
gr = ppl("robustify", task, lrn) %>>% po("learner", lrn)

# all Graphs currently in the dictionary:
#>            key
#> 1:     bagging
#> 2:      branch
#> 3:  greplicate
#> 4:         ovr
#> 5:   robustify
#> 6:    stacking
#> 7: targettrafo