The ContextBatchFSelect allows CallbackBatchFSelects to access and modify data while a batch of feature sets is evaluated.
See the section on active bindings for a list of modifiable objects.
See callback_batch_fselect()
for a list of stages that access ContextBatchFSelect.
Details
This context is re-created each time a new batch of feature sets is evaluated.
Changes to $objective_fselect
, $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 classes
mlr3misc::Context
-> bbotk::ContextBatch
-> ContextBatchFSelect
Active bindings
xss
(list())
The feature sets of the latest batch.design
(data.table::data.table)
The benchmark design of the latest batch.benchmark_result
(mlr3::BenchmarkResult)
The benchmark result of the latest batch.aggregated_performance
(data.table::data.table)
Aggregated performance scores and training time of the latest batch. This data table is passed to the archive. A callback can add additional columns which are also written to the archive.