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0.8

Major changes

  • Upgrade to ConfigSpace (0.4.X), which is not backwards compatible. On the plus side, the ConfigSpace is about 3-10 times faster, depending on the task.
  • FIX #240: improved output directory structure. If the user does not specify an output directory a SMAC experiment will have the following structure: smac_/run_<run_id>/*.json. The user can specify a output directory, e.g. ./myExperiment or ./myExperiment/ which results in ./myExperiment/run_<run_id>/*.json.
  • Due to changes in AnaConda's compiler setup we drop the unit tests for python3.4.

Interface changes

  • Generalize the interface of the acquisition functions to work with ConfigSpaces's configuration objects instead of numpy arrays.
  • The acquisition function optimizer can now be passed to the SMBO object.
  • A custom SMBO class can now be passed to the SMAC builder object.
  • run_id is no longer an argument to the Scenario object, making the interface a bit cleaner.

Minor changes

  • #333 fixes an incompability with uncorrelated_mo_rf_with_instances.
  • #323 fixes #324 and #319, which both improve the functioning of the built-in validation tools.
  • #350 fixes random search, which could accidentaly use configurations found my a local acquisition function optimizer.
  • #336 makes validation more flexible.

0.7.2

  • Introduce version upper bound on ConfigSpace dependency (<0.4).

0.7.1

  • FIX #193, restoring the scenario now possible.
  • ADD #271 validation.
  • FIX #311 abort on first crash.
  • FIX #318, ExecuteTARunOld now always returns a StatusType.

0.6

Major changes

  • MAINT documentation (nearly every part was improved and extended, including installation, examples, API).
  • ADD EPILS as mode (modified version of ParamILS).
  • MAINT minimal required versions of configspace, pyrfr, sklearn increased (several issues fixed in new configspace version).
  • MAINT for quality scenarios, the user can specify the objective value for crashed runs (returned NaN and Inf are replaced by value for crashed runs).

Minor changes

  • FIX issue #220, do not store external data in runhistory.
  • MAINT TAEFunc without pynisher possible.
  • MAINT intensification: minimal number of required challengers parameterized.
  • FIX saving duplicated (capped) runs.
  • FIX handling of ordinal parameters.
  • MAINT runobj is now mandatory.
  • FIX arguments passed to pyrfr.

0.5

Major changes

  • MAINT #192: SMAC uses version 0.4 of the random forest library pyrfr. As a side-effect, the library swig is necessary to build the random forest.
  • MAINT: random samples which are interleaved in the list of challengers are now obtained from a generator. This reduces the overhead of sampling random configurations.
  • FIX #117: only round the cutoff when running a python function as the target algorithm.
  • MAINT #231: Rename the submodule smac.smbo to smac.optimizer.
  • MAINT #213: Use log(EI) as default acquisition function when optimizing running time of an algorithm.
  • MAINT #223: updated example of optimizing a random forest with SMAC.
  • MAINT #221: refactored the EPM module. The PCA on instance features is now part of fitting the EPM instead of reading a scenario. Because of this restructuring, the PCA can now take instance features which are external data into account.

Minor changes

  • SMAC now outputs scenario options if the log level is DEBUG (2f0ceee).
  • SMAC logs the command line call if invoked from the command line (3accfc2).
  • SMAC explicitly checks that it runs in python>=3.4.
  • MAINT #226: improve efficientcy when loading the runhistory from a json file.
  • FIX #217: adds milliseconds to the output directory names to avoid race. conditions when starting multiple runs on a cluster.
  • MAINT #209: adds the seed or a pseudo-seed to the output directory name for better identifiability of the output directories.
  • FIX #216: replace broken call to in EIPS acqusition function.
  • MAINT: use codecov.io instead of coveralls.io.
  • MAINT: increase minimal required version of the ConfigSpace package to 0.3.2.

0.4

  • ADD #204: SMAC now always saves runhistory files as runhistory.json.
  • MAINT #205: the SMAC repository now uses codecov.io instead of coveralls.io.
  • ADD #83: support of ACLIB 2.0 parameter configuration space file.
  • FIX #206: instances are now explicitly cast to str. In case no instance is given, a single None is used, which is not cast to str.
  • ADD #200: new convenience function to retrieve an X, y representation of the data to feed it to a new fANOVA implementation.
  • MAINT #198: improved pSMAC interface.
  • FIX #201: improved handling of boolean arguments to SMAC.
  • FIX #194: fixes adaptive capping with re-occurring configurations.
  • ADD #190: new argument intensification_percentage.
  • ADD #187: better dependency injection into main SMAC class to avoid ill-configured SMAC objects.
  • ADD #161: log scenario object as a file.
  • ADD #186: show the difference between old and new incumbent in case of an incumbent change.
  • MAINT #159: consistent naming of loggers.
  • ADD #128: new helper method to get the target algorithm evaluator.
  • FIX #165: default value for par = 1.
  • MAINT #153: entries in the trajectory logger are now named tuples.
  • FIX #155: better handling of SMAC shutdown and crashes if the first configuration crashes.

0.3

  • Major speed improvements when sampling new configurations:
    • Improved conditional hyperparameter imputation (PR #176).
    • Faster generation of the one exchange neighborhood (PR #174).
  • FIX #171 potential bug with pSMAC.
  • FIX #175 backwards compability for reading runhistory files.

0.2.4

  • CI only check code quality for python3.
  • Perform local search on configurations from previous runs as proposed in the original paper from 2011 instead of random configurations as implemented before.
  • CI run travis-ci unit tests with python3.6.
  • FIX #167, remove an endless loop which occured when using pSMAC.

0.2.3

  • MAINT refactor Intensifcation and adding unit tests.
  • CHANGE StatusType to Enum.
  • RM parameter importance package.
  • FIX ROAR facade bug for cli.
  • ADD easy access of runhistory within Python.
  • FIX imputation of censored data.
  • FIX conversion of runhistory to EPM training data (in particular running time data).
  • FIX initial run only added once in runhistory.
  • MV version number to a separate file.
  • MAINT more efficient computations in run_history (assumes average as aggregation function across instances).

0.2.2

  • FIX 124: SMAC could crash if the number of instances was less than seven.
  • FIX 126: Memory limit was not correctly passed to the target algorithm evaluator.
  • Local search is now started from the configurations with highest EI, drawn by random sampling.
  • Reduce the number of trees to 10 to allow faster predictions (as in SMAC2).
  • Do an adaptive number of stochastic local search iterations instead of a fixd number (a5914a1d97eed2267ae82f22bd53246c92fe1e2c).
  • FIX a bug which didn't make SMAC run at least two configurations per call to intensify.
  • ADD more efficient data structure to update the cost of a configuration.
  • FIX do only count a challenger as a run if it actually was run (and not only considered)(a993c29abdec98c114fc7d456ded1425a6902ce3).

0.2.1

  • CI: travis-ci continuous integration on OSX.
  • ADD: initial design for mulitple configurations, initial design for a random configuration.
  • MAINT: use sklearn PCA if more than 7 instance features are available (as in SMAC 1 and 2).
  • MAINT: use same minimum step size for the stochastic local search as in SMAC2.
  • MAINT: use same number of imputation iterations as in SMAC2.
  • FIX 98: automatically seed the configuration space object based on the SMAC seed.

0.2

  • ADD 55: Separate modules for the initial design and a more flexible constructor for the SMAC class.
  • ADD 41: Add ROAR (random online adaptive racing) class.
  • ADD 82: Add fmin_smac, a scipy.optimize.fmin_l_bfgs_b-like interface to the SMAC algorithm.
  • NEW documentation at https://automl.github.io/SMAC3/stable and https://automl.github.io/SMAC3/dev.
  • FIX 62: intensification previously used a random seed from np.random instead of from SMAC's own random number generator.
  • FIX 42: class RunHistory can now be pickled.
  • FIX 48: stats and runhistory objects are now injected into the target algorithm execution classes.
  • FIX 72: it is now mandatory to either specify a configuration space or to pass the path to a PCS file.
  • FIX 49: allow passing a callable directly to SMAC. SMAC will wrap the callable with the appropriate target algorithm runner.

0.1.3

  • FIX 63 using memory limit for function target algorithms (broken since 0.1.1).

0.1.2

  • FIX 58 output of the final statistics.
  • FIX 56 using the command line target algorithms (broken since 0.1.1).
  • FIX 50 as variance prediction, we use the average predicted variance across the instances.

0.1.1

  • NEW leading ones examples.
  • NEW raise exception if unknown parameters are given in the scenario file.
  • FIX 17/26/35/37/38/39/40/46.
  • CHANGE requirement of ConfigSpace package to 0.2.1.
  • CHANGE cutoff default is now None instead of 99999999999.

0.1.0

  • Moved to github instead of bitbucket.
  • ADD further unit tests.
  • CHANGE Stats object instead of static class.
  • CHANGE requirement of ConfigSpace package to 0.2.0.
  • FIX intensify runs at least two challengers.
  • FIX intensify skips incumbent as challenger.
  • FIX Function TAE runner passes random seed to target function.
  • FIX parsing of emtpy lines in scenario file.

0.0.1

  • initial release.