mlr3pipelines
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Optional Channels
PipeOps may have "optional" channels that are not used by the %>>%
operator but can still be used by using add_edge()
. This is useful to provide an additional result of an operation that is rarely used but may be useful in some cases. E.g. feature importance of a PipeOpLearner
or PipeOpLearnerCV
Maybe set formula hyperparameter of a learner through a previous pipeop