mlr3fselect.backup: Backup Benchmark Result Callback

In mlr3fselect: Feature Selection for 'mlr3'

Backup Benchmark Result Callback

Description

This CallbackBatchFSelect writes the mlr3::BenchmarkResult after each batch to disk. The path must be set, e.g. clbk("mlr3fselect.backup", path = "backup.rds"). The benchmark result is written to a temporary file first and then renamed, so that a crash while writing does not destroy the backup of the previous batch.

Examples

clbk("mlr3fselect.backup", path = "backup.rds")

# Run feature selection on the Palmer Penguins data set
instance = fselect(
  fselector = fs("random_search"),
  task = tsk("diabetes"),
  learner = lrn("classif.rpart"),
  resampling = rsmp ("holdout"),
  measures = msr("classif.ce"),
  term_evals = 4,
  callbacks = clbk("mlr3fselect.backup", path = tempfile(fileext = ".rds")))

mlr3fselect documentation built on Aug. 23, 2026, 5:08 p.m.