no code implementations • 8 Feb 2023 • Jakob Raymaekers, Peter J. Rousseeuw, Tim Verdonck, Ruicong Yao
Linear model trees are regression trees that incorporate linear models in the leaf nodes.
no code implementations • 27 Jul 2022 • Jakob Raymaekers, Peter J. Rousseeuw
On the other hand, cellwise outliers are individual cells in the data matrix.
no code implementations • 16 Jun 2021 • Jakob Raymaekers, Peter J. Rousseeuw
Here we pursue a different goal, which is to visualize the cases being classified, either in training data or in test data.
3 code implementations • 12 Aug 2020 • Erich Schubert, Peter J. Rousseeuw
While we do not study the parallelization of our approach in this work, it can easily be combined with earlier approaches to use PAM and CLARA on big data (some of which use PAM as a subroutine, hence can immediately benefit from these improvements), where the performance with high k becomes increasingly important.
1 code implementation • 5 Aug 2020 • Joachim Schreurs, Iwein Vranckx, Mia Hubert, Johan A. K. Suykens, Peter J. Rousseeuw
The minimum regularized covariance determinant method (MRCD) is a robust estimator for multivariate location and scatter, which detects outliers by fitting a robust covariance matrix to the data.
no code implementations • 28 Jul 2020 • Jakob Raymaekers, Peter J. Rousseeuw, Mia Hubert
A classification method first processes a training set of objects with given classes (labels), with the goal of afterward assigning new objects to one of these classes.
no code implementations • 16 May 2020 • Jakob Raymaekers, Peter J. Rousseeuw
Many real data sets contain numerical features (variables) whose distribution is far from normal (gaussian).
4 code implementations • 12 Oct 2018 • Erich Schubert, Peter J. Rousseeuw
It can easily be combined with earlier approaches to use PAM and CLARA on big data (some of which use PAM as a subroutine, hence can immediately benefit from these improvements), where the performance with high k becomes increasingly important.
no code implementations • 28 Aug 2017 • Peter J. Rousseeuw, Domenico Perrotta, Marco Riani, Mia Hubert
Time series often contain outliers and level shifts or structural changes.
Computation
no code implementations • 31 Jul 2017 • Peter J. Rousseeuw, Mia Hubert
Real data often contain anomalous cases, also known as outliers.