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A classification task for the German credit data set. The aim is to predict creditworthiness, labeled as "good" and "bad". Positive class is set to label "good".

See example for the creation of a MeasureClassifCosts as described misclassification costs.


R6::R6Class inheriting from TaskClassif.


Data set originally published on UCI. This is the preprocessed version taken from package rchallenge with factors instead of dummy variables, and corrected as proposed by Ulrike Grömping.

Donor: Professor Dr. Hans Hofmann
Institut für Statistik und Ökonometrie
Universität Hamburg
FB Wirtschaftswissenschaften
Von-Melle-Park 5
2000 Hamburg 13


This Task can be instantiated via the dictionary mlr_tasks or with the associated sugar function tsk():


Meta Information

  • Task type: “classif”

  • Dimensions: 1000x21

  • Properties: “twoclass”

  • Has Missings: FALSE

  • Target: “credit_risk”

  • Features: “age”, “amount”, “credit_history”, “duration”, “employment_duration”, “foreign_worker”, “housing”, “installment_rate”, “job”, “number_credits”, “other_debtors”, “other_installment_plans”, “people_liable”, “personal_status_sex”, “present_residence”, “property”, “purpose”, “savings”, “status”, “telephone”


Grömping U (2019). “South German Credit Data: Correcting a Widely Used Data Set.” Reports in Mathematics, Physics and Chemistry 4, Department II, Beuth University of Applied Sciences Berlin.

See also

Other Task: Task, TaskClassif, TaskRegr, TaskSupervised, TaskUnsupervised, mlr_tasks, mlr_tasks_boston_housing, mlr_tasks_breast_cancer, mlr_tasks_iris, mlr_tasks_mtcars, mlr_tasks_penguins, mlr_tasks_pima, mlr_tasks_sonar, mlr_tasks_spam, mlr_tasks_wine, mlr_tasks_zoo


task = tsk("german_credit")
costs = matrix(c(0, 1, 5, 0), nrow = 2)
dimnames(costs) = list(predicted = task$class_names, truth = task$class_names)
measure = msr("classif.costs", id = "german_credit_costs", costs = costs)
#> <MeasureClassifCosts:german_credit_costs>: Cost-sensitive Classification
#> * Packages: mlr3
#> * Range: [0, Inf]
#> * Minimize: TRUE
#> * Average: macro
#> * Parameters: normalize=TRUE
#> * Properties: -
#> * Predict type: response