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Changelog

Source: NEWS.md

mlr3mbo (development version)

mlr3mbo 0.3.3

CRAN release: 2025-10-10

  • compatibility: bbotk 1.7.0

mlr3mbo 0.3.2

CRAN release: 2025-10-02

  • compatibility: mlr3learners 0.13.0

mlr3mbo 0.3.1

CRAN release: 2025-08-19

  • chore: maintainer change.
  • chore: work with new mlr3pipelines version 0.9.0 (fix for tests only).
  • test: expect_rush_reset changes related to rush developments.
  • fix: allow InputTrafoUnitcube to work in mixed spaces.

mlr3mbo 0.3.0

CRAN release: 2025-06-03

  • fix: logger changes related to bbotk.
  • fix: assure that candidates after acquisition function optimization are always within bounds.
  • perf: minor changes to speed up predictions with SurrogateLearner and SurrogateLearnerCollection.
  • feat: added supported for input and output transformations (see InputTrafo, OutputTrafo and the related classes).
  • refactor: dropped functionality to assert insample performance of the surrogate model completely.

mlr3mbo 0.2.9

CRAN release: 2025-03-04

  • chore: silence rush logger and fixed some partial matches, depend on mlr3 >= 0.22.1.
  • test: fix test_AcqFunctionMulti, robustify helper and loading.
  • test: fix test_ResultAssignerArchive and test_ResultAssignerSurrogate due to upcoming changes of internal tuned values in mlr3tuning 1.3.1.

mlr3mbo 0.2.8

CRAN release: 2024-11-21

  • docs: gracefully exit examples of OptimizerAsyncMbo, OptimizerADBO, TunerAsyncMbo, and TunerADBO if Redis is not available.
  • test: skip tests involving asynchronous logic if Redis is not available.

mlr3mbo 0.2.7

CRAN release: 2024-11-15

  • refactor: refactored SurrogateLearner and SurrogateLearnerCollection to allow updating on an asynchronous Archive.
  • feat: added experimental OptimizerAsyncMbo, OptimizerADBO, TunerAsyncMbo, and TunerADBO that allow for asynchronous optimization.
  • feat: added AcqFunctionStochasticCB and AcqFunctionStochasticEI that are useful for asynchronous optimization.
  • docs: minor changes to highlight differences between batch and asynchronous objects related to asynchronous support.
  • refactor: AcqFunctions and AcqOptimizer gained a reset() method.

mlr3mbo 0.2.6

CRAN release: 2024-10-16

  • refactor: extract internal tuned values in instance.

mlr3mbo 0.2.5

CRAN release: 2024-09-24

  • docs: move vignette to mlr3book.
  • feat: add AcqFunctionMulti that can wrap multiple acquisition functions resulting in a multi-objective acquisition function problem.
  • feat: support callbacks in AcqOptimizer.
  • feat: allow AcqFunctionEI to be adjusted by epsilon to strengthen exploration.

mlr3mbo 0.2.4

CRAN release: 2024-07-06

  • fix: improve runtime of AcqOptimizer by setting check_values = FALSE.

mlr3mbo 0.2.3

CRAN release: 2024-07-01

  • compatibility: work with new bbotk and mlr3tuning version 1.0.0.

mlr3mbo 0.2.2

CRAN release: 2024-03-01

  • refactor: compatibility with upcoming paradox upgrade.
  • feat: OptimizerMbo and TunerMbo now update the Surrogate a final time after the optimization process finished to ensure that the Surrogate correctly reflects the state of being trained on all data seen during optimization.
  • fix: AcqFunction domain construction now respects Surrogate cols_x field.
  • feat: support more than one candidate point as a result of acquisition function optimization even for non-batch acquisition functions.
  • feat: added default_gp and default_rf helpers that allow for construction of a default Gaussian Process and random forest as for example used within default_surrogate.
  • refactor: changed Gaussian Process and random forest defaults (in default_gp and default_rf and therefore also in default_surrogate). Gaussian Process now uses a "matern5_2" kernel. Random forest now uses 100 trees. The number of trees used in the fallback random forest was reduced to 10.

mlr3mbo 0.2.1

CRAN release: 2023-06-05

  • docs: updated some references in vignette.
  • refactor: minor clean up of the internal structure of all loop functions.
  • perf: default initial design constructed based on a Sobol sequence in all loop functions.
  • refactor: no longer depend on mlr3tuning but import instead.
  • refactor: srlrn sugar function now can construct both a SurrogateLearner and SurrogateLearnerCollection; dropped srlrnc.
  • feat: added AcqFunctionSD, AcqFunctionEHVI and AcqFunctionEHVIGH, introduced bayesopt_emo loop function.
  • feat: AcqFunctions now include a $packages field stating required packages which are checked for whether their namespace can be loaded prior to optimization.
  • fix: fixed bug in fix_xdt_missing() helper function.
  • BREAKING CHANGE: renaming default_loopfun -> default_loop_function, default_acqfun -> default_acqfunction, default_acqopt -> default_acqoptimizer.
  • BREAKING CHANGE: result_functions now replaced by ResultAssigners.
  • BREAKING CHANGE: renamed $model field of all Surrogate classes to $learner.
  • BREAKING CHANGE: For all Surrogate and AcquisitionFunction classes fields *_cols renamed to cols_* (e.g., x_cols to cols_x).

mlr3mbo 0.1.2

CRAN release: 2023-03-02

  • refactor: adapt to mlr3tuning 0.18.0.
  • feat: acquisition functions now assert whether surrogates match their required predict type.
  • fix: unloading mlr3mbo removes optimizers and tuners from the dictionaries.
  • docs: faster examples.
  • feat: characters in surrogate regression tasks are no longer automatically converted to factors. default_surrogate now respects this and gained an appropriate pipeline step.
  • feat: AcqFunctionAEI added.
  • docs: fix of docs, README and bibentries.

mlr3mbo 0.1.1

CRAN release: 2022-11-18

  • Initial upload to CRAN.