mlr3: as_result_data – R documentation

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as_result_data

Convert to ResultData

Description

This function allows to construct or convert to a ResultData object, the result container used by ResampleResult and BenchmarkResult. A ResampleResult or BenchmarkResult can be initialized with the returned object. Note that ResampleResults can be converted to a BenchmarkResult with as_benchmark_result() and multiple BenchmarkResults can be combined to a larger BenchmarkResult with the $combine() method of BenchmarkResult.

Usage

as_result_data(
  task,
  learners,
  resampling,
  iterations,
  predictions,
  learner_states = NULL,
  store_backends = TRUE
)

Arguments

`task`	(Task).
`learners`	(list of trained Learners).
`resampling`	(Resampling).
`iterations`	(`integer()`).
`predictions`	(list of Predictions).
`learner_states`	(`list()`) Learner states. If not provided, the states of `learners` are automatically extracted.
`store_backends`	(`logical(1)`) If set to `FALSE`, the backends of the Tasks provided in `data` are removed.

Value

ResultData object which can be passed to the constructor of ResampleResult.

Examples

task = tsk("penguins")
learner = lrn("classif.rpart")
resampling = rsmp("cv", folds = 2)$instantiate(task)
iterations = seq_len(resampling$iters)

# manually train two learners.
# store learners and predictions
learners = list()
predictions = list()
for (i in iterations) {
  l = learner$clone(deep = TRUE)
  learners[[i]] = l$train(task, row_ids = resampling$train_set(i))
  predictions[[i]] = l$predict(task, row_ids = resampling$test_set(i))
}

rdata = as_result_data(task, learners, resampling, iterations, predictions)
ResampleResult$new(rdata)

mlr3

Machine Learning in R - Next Generation

v0.11.0

LGPL-3

Authors

Michel Lang [cre, aut] (<https://orcid.org/0000-0001-9754-0393>), Bernd Bischl [aut] (<https://orcid.org/0000-0001-6002-6980>), Jakob Richter [aut] (<https://orcid.org/0000-0003-4481-5554>), Patrick Schratz [aut] (<https://orcid.org/0000-0003-0748-6624>), Giuseppe Casalicchio [ctb] (<https://orcid.org/0000-0001-5324-5966>), Stefan Coors [ctb] (<https://orcid.org/0000-0002-7465-2146>), Quay Au [ctb] (<https://orcid.org/0000-0002-5252-8902>), Martin Binder [aut], Marc Becker [ctb] (<https://orcid.org/0000-0002-8115-0400>)

Initial release