target_runner_default: Default `targetRunner` function.

Description

Use it as an advanced example of how to create your own targetRunner function.

Usage

target_runner_default(experiment, scenario)

Value

If targetEvaluator is NULL, then the targetRunner

function must return a list with at least one element "cost", the numerical value corresponding to the evaluation of the given configuration on the given instance.

If the scenario option maxTime is non-zero or if capping is enabled then the list must contain at least another element "time" that reports the execution time for this call to targetRunner. The return list may also contain the following optional elements that are used by irace for reporting errors in targetRunner:

error: is a string used to report an error;
outputRaw: is a string used to report the raw output of calls to an external program or function;
call: is a string used to report how targetRunner called an external program or function.

Arguments

experiment

A list describing the experiment. It contains at least:

id_configuration: An alphanumeric string that uniquely identifies a configuration;

id_instance

An alphanumeric string that uniquely identifies an instance;

seed

Seed for the random number generator to be used for this evaluation, ignore the seed for deterministic algorithms;

instance

String giving the instance to be used for this evaluation;

bound

(only when capping is enabled) Time bound for the execution;

configuration

1-row data frame with a column per parameter name;

scenario

list()
Data structure containing irace settings. The data structure has to be the one returned by the function defaultScenario() or readScenario().

Author

Manuel López-Ibáñez and Jérémie Dubois-Lacoste