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Changelog

Source: NEWS.md

mlr3tuning 0.18.0

CRAN release: 2023-03-08

  • BREAKING CHANGE: The method parameter of tune(), tune_nested() and auto_tuner() is renamed to tuner. Only Tuner objects are accepted now. Arguments to the tuner cannot be passed with ... anymore.
  • BREAKING CHANGE: The tuner parameter of AutoTuner is moved to the first position to achieve consistency with the other functions.
  • docs: Update resources sections.
  • docs: Add list of default measures.
  • fix: Add allow_hotstarting, keep_hotstart_stack and keep_models flags to AutoTuner and auto_tuner().

mlr3tuning 0.17.2

CRAN release: 2022-12-22

  • feat: AutoTuner accepts instantiated resamplings now. The AutoTuner checks if all row ids of the inner resampling are present in the outer resampling train set when nested resampling is performed.
  • fix: Standalone Tuner did not create a ContextOptimization.

mlr3tuning 0.17.1

CRAN release: 2022-12-07

  • fix: The ti() function did not accept callbacks.

mlr3tuning 0.17.0

CRAN release: 2022-11-18

  • feat: The methods $importance(), $selected_features(), $oob_error() and $loglik() are forwarded from the final model to the AutoTuner now.
  • refactor: The AutoTuner stores the instance and benchmark result if store_models = TRUE.
  • refactor: The AutoTuner stores the instance if store_benchmark_result = TRUE.

mlr3tuning 0.16.0

CRAN release: 2022-11-08

  • feat: Add new callback that enables early stopping while tuning to mlr_callbacks.
  • feat: Add new callback that backups the benchmark result to disk after each batch.
  • feat: Create custom callbacks with the callback_tuning() function.

mlr3tuning 0.15.0

CRAN release: 2022-10-21

  • fix: AutoTuner did not accept TuningSpace objects as search spaces.
  • feat: Add ti() function to create a TuningInstanceSingleCrit or TuningInstanceMultiCrit.
  • docs: Documentation has a technical details section now.
  • feat: New option for extract_inner_tuning_results() to return the tuning instances.

mlr3tuning 0.14.0

CRAN release: 2022-08-25

  • feat: Add option evaluate_default to evaluate learners with hyperparameters set to their default values.
  • refactor: From now on, the default of smooth is FALSE for TunerGenSA.

mlr3tuning 0.13.1

CRAN release: 2022-05-03

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

mlr3tuning 0.13.0

CRAN release: 2022-04-06

  • feat: Allow to pass Tuner objects as method in tune() and auto_tuner().
  • docs: Link Tuner to help page of bbotk::Optimizer.
  • feat: Tuner objects have the optional field $label now.
  • feat: as.data.table() functions for objects of class Dictionary have been extended with additional columns.

mlr3tuning 0.12.1

CRAN release: 2022-02-25

  • feat: Add a as.data.table.DictionaryTuner function.
  • feat: New $help() method which opens the manual page of a Tuner.

mlr3tuning 0.12.0

CRAN release: 2022-02-17

  • feat: as_search_space() function to create search spaces from Learner and ParamSet objects. Allow to pass TuningSpace objects as search_space in TuningInstanceSingleCrit and TuningInstanceMultiCrit.
  • feat: The mlr3::HotstartStack can now be removed after tuning with the keep_hotstart_stack flag.
  • feat: The Archive stores errors and warnings of the learners.
  • feat: When no measure is provided, the default measure is used in auto_tuner() and tune_nested().

mlr3tuning 0.11.0

CRAN release: 2022-02-02

  • fix: $assign_result() method in TuningInstanceSingleCrit when search space is empty.
  • feat: Default measure is used when no measure is supplied to TuningInstanceSingleCrit.

mlr3tuning 0.10.0

CRAN release: 2022-01-20

  • Fixes bug in TuningInstanceMultiCrit$assign_result().
  • Hotstarting of learners with previously fitted models.
  • Remove deep clones to speed up tuning.
  • Add store_models flag to auto_tuner().
  • Add "noisy" property to ObjectiveTuning.

mlr3tuning 0.9.0

CRAN release: 2021-09-14

  • Adds AutoTuner$base_learner() method to extract the base learner from nested learner objects.
  • tune() supports multi-criteria tuning.
  • Allows empty search space.
  • Adds TunerIrace from irace package.
  • extract_inner_tuning_archives() helper function to extract inner tuning archives.
  • Removes ArchiveTuning$extended_archive() method. The mlr3::ResampleResults are joined automatically by as.data.table.TuningArchive() and extract_inner_tuning_archives().

mlr3tuning 0.8.0

CRAN release: 2021-03-12

  • Adds tune(), auto_tuner() and tune_nested() sugar functions.
  • TuningInstanceSingleCrit, TuningInstanceMultiCrit and AutoTuner can be initialized with store_benchmark_result = FALSE and store_models = TRUE to allow measures to access the models.
  • Prettier printing methods.

mlr3tuning 0.7.0

CRAN release: 2021-02-11

  • Fix TuningInstance*$assign_result() errors with required parameter bug.
  • Shortcuts to access $learner(), $learners(), $learner_param_vals(), $predictions() and $resample_result() from benchmark result in archive.
  • extract_inner_tuning_results() helper function to extract inner tuning results.

mlr3tuning 0.6.0

CRAN release: 2021-01-24

  • ArchiveTuning$data is a public field now.

mlr3tuning 0.5.0

CRAN release: 2020-12-07

  • Adds TunerCmaes from adagio package.
  • Fix predict_type in AutoTuner.
  • Support to set TuneToken in Learner$param_set and create a search space from it.
  • The order of the parameters in TuningInstanceSingleCrit and TuningInstanceSingleCrit changed.

mlr3tuning 0.4.0

CRAN release: 2020-10-07

  • Option to control store_benchmark_result, store_models and check_values in AutoTuner. store_tuning_instance must be set as a parameter during initialization.
  • Fixes check_values flag in TuningInstanceSingleCrit and TuningInstanceMultiCrit.
  • Removed dependency on orphaned package bibtex.

mlr3tuning 0.3.0

CRAN release: 2020-09-08

  • Compact in-memory representation of R6 objects to save space when saving mlr3 objects via saveRDS(), serialize() etc.
  • Archive is ArchiveTuning now which stores the benchmark result in $benchmark_result. This change removed the resample results from the archive but they can be still accessed via the benchmark result.
  • Warning message if external package for tuning is not installed.
  • To retrieve the inner tuning results in nested resampling, as.data.table(rr)$learner[[1]]$tuning_result must be used now.

mlr3tuning 0.2.0

CRAN release: 2020-07-28

  • TuningInstance is now TuningInstanceSingleCrit. TuningInstanceMultiCrit is still available for multi-criteria tuning.
  • Terminators are now accessible by trm() and trms() instead of term() and terms().
  • Storing of resample results is optional now by using the store_resample_result flag in TuningInstanceSingleCrit and TuningInstanceMultiCrit
  • TunerNLoptr adds non-linear optimization from the nloptr package.
  • Logging is controlled by the bbotk logger now.
  • Proposed points and performance values can be checked for validity by activating the check_values flag in TuningInstanceSingleCrit and TuningInstanceMultiCrit.

mlr3tuning 0.1.3

  • mlr3tuning now depends on the bbotk package for basic tuning objects. Terminator classes now live in bbotk. As a consequence ObjectiveTuning inherits from bbotk::Objective, TuningInstance from bbotk::OptimInstance and Tuner from bbotk::Optimizer
  • TuningInstance$param_set becomes TuningInstance$search_space to avoid confusion as the param_set usually contains the parameters that change the behavior of an object.
  • Tuning is triggered by $optimize() instead of $tune()

mlr3tuning 0.1.2

CRAN release: 2020-01-31

  • Fixed a bug in AutoTuner where a $clone() was missing. Tuning results are unaffected, only stored models contained wrong hyperparameter values (#223).
  • Improved output log (#218).

mlr3tuning 0.1.1

CRAN release: 2019-12-06

  • Maintenance release.

mlr3tuning 0.1.0

CRAN release: 2019-09-30

  • Initial prototype.