no code implementations • 15 Jun 2022 • Florian Karl, Tobias Pielok, Julia Moosbauer, Florian Pfisterer, Stefan Coors, Martin Binder, Lennart Schneider, Janek Thomas, Jakob Richter, Michel Lang, Eduardo C. Garrido-Merchán, Juergen Branke, Bernd Bischl
Hyperparameter optimization constitutes a large part of typical modern machine learning workflows.
1 code implementation • 29 Nov 2021 • Julia Moosbauer, Martin Binder, Lennart Schneider, Florian Pfisterer, Marc Becker, Michel Lang, Lars Kotthoff, Bernd Bischl
Automated hyperparameter optimization (HPO) has gained great popularity and is an important ingredient of most automated machine learning frameworks.
1 code implementation • 25 Oct 2021 • Patrick Schratz, Marc Becker, Michel Lang, Alexander Brenning
This contribution reviews the state-of-the-art in spatial and spatiotemporal cross-validation, and introduces the {R} package {mlr3spatiotempcv} as an extension package of the machine-learning framework {mlr3}.
no code implementations • 13 Jul 2021 • Bernd Bischl, Martin Binder, Michel Lang, Tobias Pielok, Jakob Richter, Stefan Coors, Janek Thomas, Theresa Ullmann, Marc Becker, Anne-Laure Boulesteix, Difan Deng, Marius Lindauer
Most machine learning algorithms are configured by one or several hyperparameters that must be carefully chosen and often considerably impact performance.
no code implementations • 15 Jun 2021 • Andrea Bommert, Jörg Rahnenführer, Michel Lang
We propose the approach of tuning the hyperparameters of a predictive model in a multi-criteria fashion with respect to predictive accuracy and feature selection stability.
no code implementations • 18 Aug 2020 • Raphael Sonabend, Franz J. Király, Andreas Bender, Bernd Bischl, Michel Lang
As machine learning has become increasingly popular over the last few decades, so too has the number of machine learning interfaces for implementing these models.
no code implementations • 14 Aug 2020 • Rudolf Jagdhuber, Michel Lang, Jörg Rahnenführer
Cost-sensitive feature selection describes a feature selection problem, where features raise individual costs for inclusion in a model.
1 code implementation • 24 Feb 2019 • Xudong Sun, Andrea Bommert, Florian Pfisterer, Jörg Rahnenführer, Michel Lang, Bernd Bischl
To carry out a clinical research under this scenario, an analyst could train a machine learning model only on local data site, but it is still possible to execute a statistical query at a certain cost in the form of sending a machine learning model to some of the remote data sites and get the performance measures as feedback, maybe due to prediction being usually much cheaper.
4 code implementations • 11 Aug 2017 • Bernd Bischl, Giuseppe Casalicchio, Matthias Feurer, Pieter Gijsbers, Frank Hutter, Michel Lang, Rafael G. Mantovani, Jan N. van Rijn, Joaquin Vanschoren
Machine learning research depends on objectively interpretable, comparable, and reproducible algorithm benchmarks.
4 code implementations • 9 Mar 2017 • Bernd Bischl, Jakob Richter, Jakob Bossek, Daniel Horn, Janek Thomas, Michel Lang
We present mlrMBO, a flexible and comprehensive R toolbox for model-based optimization (MBO), also known as Bayesian optimization, which addresses the problem of expensive black-box optimization by approximating the given objective function through a surrogate regression model.
1 code implementation • 5 Jan 2017 • Giuseppe Casalicchio, Jakob Bossek, Michel Lang, Dominik Kirchhoff, Pascal Kerschke, Benjamin Hofner, Heidi Seibold, Joaquin Vanschoren, Bernd Bischl
We show how the OpenML package allows R users to easily search, download and upload data sets and machine learning tasks.
no code implementations • 18 Sep 2016 • Julia Schiffner, Bernd Bischl, Michel Lang, Jakob Richter, Zachary M. Jones, Philipp Probst, Florian Pfisterer, Mason Gallo, Dominik Kirchhoff, Tobias Kühn, Janek Thomas, Lars Kotthoff
This document provides and in-depth introduction to the mlr framework for machine learning experiments in R.