TunerGridSearch

Subclass for grid search tuning.

The grid is constructed as a Cartesian product over discretized values per parameter, see paradox::generate_design_grid(). The points of the grid are evaluated in a random order.

In order to support general termination criteria and parallelization, we evaluate points in a batch-fashion of size batch_size. Larger batches mean we can parallelize more, smaller batches imply a more fine-grained checking of termination criteria.

Format

R6::R6Class object inheriting from Tuner.

Construction

TunerGridSearch$new()
tnr("grid_search")

Parameters

• resolution :: integer(1)
  Resolution of the grid, see paradox::generate_design_grid().

• param_resolutions :: named integer()
  Resolution per parameter, named by parameter ID, see paradox::generate_design_grid().

• batch_size :: integer(1)
  Maximum number of configurations to try in a batch.

See also

Other Tuner: Tuner, mlr_tuners_design_points, mlr_tuners_gensa, mlr_tuners_random_search, mlr_tuners

Examples

# see ?Tuner