NEWS

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mlr3fselect 1.5.1 (2026-03-18)

• compatibility: rush 1.0.0

mlr3fselect 1.5.0 (2025-11-27)

• fix: Add always_included column role to all registered tasks.
• perf: Add fast aggregation for ResampleResult and BenchmarkResult objects to speed up objective function evaluation.

mlr3fselect 1.4.0 (2025-07-31)

• feat: Introduce asynchronous optimization with the FSelectorAsync and FSelectInstanceAsync* classes.
• feat: Add max_nfeatures argument in the pareto_front() and knee_points() methods of an EnsembleFSResult().
• feat: Classes are now printed with the cli package.

mlr3fselect 1.3.0 (2025-01-16)

• refactor: Use fastVoteR for feature ranking in EnsembleFSResult() objects
• feat: Add embedded ensemble feature selection embedded_ensemble_fselect()
• refactor/perf: ensemble_fselect() and EnsembleFSResult()
• feat: Add c.EnsembleFSResult(...) and EnsembleFSResult$combine(...) methods

mlr3fselect 1.2.1 (2024-11-07)

• compatibility: mlr3 0.22.0

mlr3fselect 1.2.0 (2024-10-25)

• feat: Add internal tuning callback mlr3fselect.internal_tuning.
• fix: Register mlr3fselect in the mlr_reflections$loaded_packages field.

mlr3fselect 1.1.1 (2024-10-15)

• compatibility: bbotk 1.1.1

mlr3fselect 1.1.0 (2024-09-09)

• compatibility: mlr3 0.21.0
• fix: Delete intermediate BenchmarkResult in ObjectiveFSelectBatch after optimization.
• fix: Reloading mlr3fselect does not duplicate column roles anymore.
• perf: Remove x_domain column from archive.

mlr3fselect 1.0.0 (2024-06-29)

• feat: Add ensemble feature selection function ensemble_fselect().
• BREAKING CHANGE: The FSelector class is FSelectorBatch now.
• BREAKING CHANGE: THe FSelectInstanceSingleCrit and FSelectInstanceMultiCrit classes are FSelectInstanceBatchSingleCrit and FSelectInstanceBatchMultiCrit now.
• BREAKING CHANGE: The CallbackFSelect class is CallbackBatchFSelect now.
• BREAKING CHANGE: The ContextEval class is ContextBatchFSelect now.

mlr3fselect 0.12.0 (2024-03-09)

• feat: Add number of features to instance$result.
• feat: Add ties_method options "least_features" and "random" to ArchiveBatchFSelect$best().
• refactor: Optimize runtime of ArchiveBatchFSelect$best() method.
• feat: Add importance scores to result of FSelectorRFE.
• feat: Add number of features to as.data.table.ArchiveBatchFSelect().
• feat: Features can be always included with the always_include column role.
• fix: Add $phash() method to AutoFSelector.
• fix: Include FSelector in hash of AutoFSelector.
• refactor: Change default batch size of FSelectorBatchRandomSearch to 10.
• feat: Add batch_size parameter to FSelectorBatchExhaustiveSearch to reduce memory consumption.
• compatibility: Work with new paradox version 1.0.0

mlr3fselect 0.11.0 (2023-03-02)

• BREAKING CHANGE: The method parameter of fselect(), fselect_nested() and auto_fselector() is renamed to fselector. Only FSelector objects are accepted now. Arguments to the fselector cannot be passed with ... anymore.
• BREAKING CHANGE: The fselect parameter of FSelector is moved to the first position to achieve consistency with the other functions.
• docs: Update resources sections.
• docs: Add list of default measures.

mlr3fselect 0.10.0 (2023-02-21)

• feat: Add callback mlr3fselect.svm_rfe to run recursive feature elimination on linear support vector machines.
• refactor: The importance scores in FSelectorRFE are now aggregated by rank instead of averaging them.
• feat: Add FSelectorRFECV optimizer to run recursive feature elimination with cross-validation.
• refactor: FSelectorRFE works without store_models = TRUE now.
• feat: The as.data.table.ArchiveBatchFSelect() function additionally returns a character vector of selected features for each row.
• refactor: Add callbacks argument to fsi() function.

mlr3fselect 0.9.1 (2023-01-26)

• refactor: Remove internal use of mlr3pipelines.
• fix: Feature selection with measures that require the importance or oob error works now.

mlr3fselect 0.9.0 (2022-12-21)

• fix: Add genalg to required packages of FSelectorBatchGeneticSearch.
• feat: Add new callback that backups the benchmark result to disk after each batch.
• feat: Create custom callbacks with the callback_batch_fselect() function.

mlr3fselect 0.8.0 (2022-11-16)

• refactor: FSelectorRFE throws an error if the learner does not support the $importance() method.
• refactor: The AutoFSelector stores the instance and benchmark result if store_models = TRUE.
• refactor: The AutoFSelector stores the instance if store_benchmark_result = TRUE.
• feat: Add missing parameters from AutoFSelector to auto_fselect().
• feat: Add fsi() function to create a FSelectInstanceBatchSingleCrit or FSelectInstanceBatchMultiCrit.
• refactor: Remove unnest option from as.data.table.ArchiveBatchFSelect() function.

mlr3fselect 0.7.2 (2022-08-25)

• docs: Re-generate rd files with valid html.

mlr3fselect 0.7.1 (2022-05-03)

• feat: FSelector objects have the field $id now.

mlr3fselect 0.7.0 (2022-04-08)

• feat: Allow to pass FSelector objects as method in fselect() and auto_fselector().
• feat: Added $label to FSelectors.
• docs: New examples with fselect() function.
• feat: $help() method which opens manual page of a FSelector.
• feat: Added a as.data.table.DictionaryFSelector function.
• feat: Added min_features parameter to FSelectorBatchSequential.

mlr3fselect 0.6.1 (2022-01-20)

• Add store_models flag to fselect().
• Remove store_x_domain flag.

mlr3fselect 0.6.0 (2021-09-13)

• Adds AutoFSelector$base_learner() method to extract the base learner from nested learner objects.
• Adds fselect(), auto_fselector() and fselect_nested() sugar functions.
• Adds extract_inner_fselect_results() and extract_inner_fselect_archives() helper function to extract inner feature selection results and archives.

mlr3fselect 0.5.1 (2021-03-09)

• Remove x_domain column from archive.

mlr3fselect 0.5.0 (2021-01-24)

• FSelectorRFE stores importance values of each evaluated feature set in archive.
• ArchiveBatchFSelect$data is a public field now.

mlr3fselect 0.4.1 (2020-10-30)

• Fix bug in AutoFSelector$predict()

mlr3fselect 0.4.0 (2020-10-22)

• Compact in-memory representation of R6 objects to save space when saving mlr3 objects via saveRDS(), serialize() etc.
• FSelectorRFE supports fraction of features to retain in each iteration (feature_fraction), number of features to remove in each iteration (feature_number) and vector of number of features to retain in each iteration (subset_sizes).
• AutoFSelect is renamed to AutoFSelector.
• To retrieve the inner feature selection results in nested resampling, as.data.table(rr)$learner[[1]]$fselect_result must be used now.
• Option to control store_benchmark_result, store_models and check_values in AutoFSelector. store_fselect_instance must be set as a parameter during initialization.
• Adds FSelectorBatchGeneticSearch.
• Fixes check_values flag in FSelectInstanceBatchSingleCrit and FSelectInstanceBatchMultiCrit.
• Removed dependency on orphaned package bibtex.
• PipeOpSelect is internally used for task subsetting.

mlr3fselect 0.3.0 (2020-09-22)

• Archive is ArchiveBatchFSelect now which stores the benchmark result in $benchmark_result. This change removed the resample results from the archive but they can be still accessed via the benchmark result.

mlr3fselect 0.2.1 (2020-09-10)

• Warning message if external package for feature selection is not installed.

mlr3fselect 0.2.0 (2020-08-23)

• Initial CRAN release.