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DESCRIPTION

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Package: mlr3pipelines
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Title: Preprocessing Operators and Pipelines for 'mlr3'
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Version: 0.8.0-9000
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Version: 0.9.0
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Authors@R:
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c(person(given = "Martin",
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family = "Binder",

NEWS.md

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# mlr3pipelines 0.8.0-9000
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# mlr3pipelines 0.9.0
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* Breaking change: Removed initialization of `PipeOpImputeConstant`'s `constant` hyperparameter since it was incompatible with other defaults and would lead to not recommended usage (creating an empty level).
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* Fixed a grammatical error in `PipeOp`'s error message wrapper: now correctly says "This happened *in* ...".
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* Removed compatibility for old `paradox` versions pre-1.0.0.
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* Added `empty_level_control` argument to `PipeOpImpute` allowing control over edge cases for `factor`/`ordered` columns.
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* Set new construction argument `empty_level_control` to `"param"` for `PipeOpImputeOOR` and to `"always"` for `PipeOpImputeConstant`.
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* Fix: `PipeOpImputeOOR` now imputes `".MISSING"` for `factor`/`ordered` features with only `NA`s instead of sampling from the feature's levels.
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* Fix: `PipeOpImputeLearner` no longer adds `"factor"` or `"ordered"` levels for these feature types arbitrarily and instead updates levels correctly in certain edge-cases.
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* Fixed the error message for unexpected Multiplicities in the input and output type checking during `PipeOp`s training and prediction.
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* Untrained `PipeOp`s that take `NULL` as input during training now automatically perform training during prediction.
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* `PipeOpImputeConstant`, `PipeOpImputeMode`, `PipeOpImputeOOR`, and `PipeOpImputeLearner` can now handle `factor` or `ordered` features with zero levels.
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* `PipeOpImputeConstant` now gives a more informative error message if `check_levels` is `TRUE` and a new level would be created through imputation.
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* Removed compatibility for old `paradox` versions pre-1.0.0.
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* Fix: `PipeOpImputeOOR` now imputes `".MISSING"` for `factor`/`ordered` features with only `NA`s instead of sampling from the feature's levels.
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* Fix: `PipeOpImputeLearner` no longer adds `"factor"` or `"ordered"` levels for these feature types arbitrarily and instead updates levels correctly in certain edge-cases.
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* Fixed the error message for unexpected Multiplicities in the input and output type checking during `PipeOp`s training and prediction.
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* Fixed a grammatical error in `PipeOp`'s error message wrapper: now correctly says "This happened *in* ...".
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# mlr3pipelines 0.8.0
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