dials 1.3.0

Improvements

• The space-filling design functionality was expanded to include several new types of designs: Audze-Eglais, max/min L1, max/min L2, and uniform. These are all pre-computed designs accessed from the sfd package (#329).

• A new function is used to access all of the space-filling designs called grid_space_filling() (#329).

• Two new parameters, activation_2() and hidden_units_2(), for use with brulee::brulee_mlp_two_layer() (#339).

Deprecations

• grid_max_entropy() and grid_latin_hypercube() are deprecated in favor of grid_space_filling() (#332).

• pull_dials_object() has been removed (#344).

• The grid_*() methods for workflow objects have been removed (#344).

• The deprecation of the default argument to the constructors new_quant_param() and new_qual_param() has been escalated to an error (#344).

dials 1.2.1

New parameters

• Added initial_umap() and target_weight() for recipes::step_umap() (#324).

Other changes

• Improving styling of error messages by switching to cli (#315, #317, #321).

• Update usage of tranformation functions from the scales package to their new names and require the corresponding version v1.3.0 (#323).

dials 1.2.0

New parameters

• Added trim_amount() for recipes::step_impute_mean().

• Added num_runs() for recipes::step_nnmf() (#281).

• Added harmonic_frequency() for recipes::step_harmonic() (#281).

• Added validation_set_prop() for embed::step_discretize_xgb() (#280).

Other changes

• Deprecation of pull_dials_object() has been escalated to an error. Please use extract_parameter_dials() instead (#265).

• The methods grid_regular.workflow(), grid_random.workflow(), grid_max_entropy.workflow(), and grid_latin_hypercube.workflow() have been deprecated (#302).

• The constructor functions for single parameters, new_quant_param() and new_qual_param(), as well as for parameter sets, parameters_constr(), now have improved handling of the call shown in error messages (#291, #295).

• The constructor for parameter sets, parameters_constr(), now checks that all inputs have the same length (#295).

dials 1.1.0

New parameters

• Added learning rate scheduler parameters rate_decay(), rate_initial(),
  rate_largest(), rate_reduction(), rate_schedule(), rate_step_size(),
  and rate_steps() for the new brulee functions (#253).

• Added num_clusters() parameter for tidyclust models (#259).

• Added num_leaves() parameter for lightbgm models (@joeycouse, #256).

Other changes

• The default argument to the constructors new_quant_param() and
  new_qual_param() is deprecated. value_seq() now uses the same logic to
  generate a sequence of parameter values regardless of how long that sequence
  is (#153, #229).

• prior_terminal_node_expo() for Bayesian adaptive regression trees (BART) now
  defaults to a range greater than 1 to limit explosive tree growth (#251).

• The label for spline_degree() was improved.

dials 1.0.0

• The new parameter mtry_prop() is a variation on mtry() where the value is
  interpreted as the proportion (rather than the count) of predictors that will
  be randomly sampled at each split (#233).

• conditional_test_statistic() and conditional_test_type() now work with the
  partykit engine rather than the party engine (#224).

• new_quant_param() no longer requires range and inclusive if values is
  supplied (#87).

dials 0.1.1

• The Chicago data set was removed. It can be found in the modeldata package.

dials 0.1.0

New parameters

• summary_stat() is a new parameter for use in recipes::step_window().

• A general class_weights() parameter was added for imbalanced models.

• prior_outcome_range(), prior_terminal_node_coef(), and
  prior_terminal_node_expo() are new parameters for prior distribution
  specification related to parsnip::bart().

• num_knots() and survival_link() are new parameters for spline survival
  models (@mattwarkentin, #195).

• vocabulary_size() is a new parameter used in
  textrecipes::step_tokenize_sentencepiece() and textrecipes::step_tokenize_bpe().

Other changes

• The new extract_parameter_dials() method supersedes pull_dials_object()
  which has been deprecated.

• activation() now supports values of "tanh".

• New link to article explaining how to make custom parameter objects was added
  to the pkgdown site.

dials 0.0.10

New parameters

• adjust_deg_free() and select_features() for generalized additive models.

• conditional_min_criterion, conditional_test_statistic,
  conditional_test_type for models with the party engine.

• diagonal_covariance(), regularization_method(), shrinkage_correlation(),
  shrinkage_frequencies(), and shrinkage_variance() for linear and
  quadratic discriminant analysis.

• penalty_L1(), penalty_L2(), and scale_pos_weight() for boosted trees
  with the xgboost engine (@joeycouse, #176).

• prior_mixture_threshold() and prior_slab_dispersion() for sparse PCA.

• stop_iter() for early stopping.

Other changes

• Re-licensed package from GPL-2 to MIT. See consent from copyright holders here.

• param_set(), scheduled for removal in version 0.0.5, is now removed.

dials 0.0.9

• Quantitative parameters now print the number of possible values if they have been set with value_set() (@kmdupr33, #138).

• The print() method for parameters() has changed to be more clear.

• A new function, pull_dials_object() was also added.

• Duplicate parameter combinations are now automatically removed from grid results.

• The range for epochs() was change to start at 10 iterations instead of 1.

• The lower range for spline_degree() now starts at 1 instead of 3.

• The upper range for cost() now goes to 2^5 instead of 2^-1.

dials 0.0.8

• A number of new parameter objects associated with engine-specific functions were added for engines "ranger", "randomForest", "earth" and "C5.0".