A CallbackAsync accesses and modifies data during the optimization via the ContextAsync.
See the section on active bindings for a list of modifiable objects.
See callback_async() for a list of stages which access ContextAsync.
mlr3misc::Context -> ContextAsync
instance(OptimInstance).
optimizer(Optimizer).
queuelogical(1)
Whether the point is from the queue.
xs(list())
The point to be evaluated in instance$.eval_point().
xs_trafoed(list())
The transformed point to be evaluated in instance$.eval_point().
extra(list())
Additional information of the point to be evaluated in instance$.eval_point().
ys(list())
The result of the evaluation in instance$.eval_point().
result_xdt(data.table::data.table)
The xdt passed to instance$assign_result().
result_y(numeric(1))
The y passed to instance$assign_result().
Only available for single criterion optimization.
result_ydt(data.table::data.table)
The ydt passed to instance$assign_result().
Only available for multi criterion optimization.
result_extra(data.table::data.table)
Additional information about the result passed to instance$assign_result().
result(data.table::data.table)
The result of the optimization in instance$assign_result().
Changes to $instance and $optimizer in the stages executed on the workers are not reflected in the main process.
CallbackAsync