The ContextEval allows CallbackTunings to access and modify data while a batch of hyperparameter configurations is evaluated. See section on active bindings for a list of modifiable objects. See callback_tuning() for a list of stages which access ContextEval.

Details

This context is re-created each time a new batch of hyperparameter configurations is evaluated. Changes to $objective_tuning, $design $benchmark_result are discarded after the function is finished. Modification on the data table in $aggregated_performance are written to the archive. Any number of columns can be added.

Super class

mlr3misc::Context -> ContextEval

Public fields

objective_tuning

Active bindings

xss

(list())

Arguments

objective_tuning
id

(character(1))
Identifier for the new callback.

Method clone()

The objects of this class are cloneable with this method.

Usage

ContextEval\$clone(deep = FALSE)

Arguments

deep

Whether to make a deep clone.