Search Results for author: Jakob Raymaekers

Found 8 papers, 1 papers with code

TSLiNGAM: DirectLiNGAM under heavy tails

no code implementations10 Aug 2023 Sarah Leyder, Jakob Raymaekers, Tim Verdonck

TSLiNGAM leverages the non-Gaussianity assumption of the error terms in the LiNGAM model to obtain more efficient and robust estimation of the causal structure.

Causal Discovery

Fast Linear Model Trees by PILOT

no code implementations8 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.

Model Selection regression

The Cellwise Minimum Covariance Determinant Estimator

no code implementations27 Jul 2022 Jakob Raymaekers, Peter J. Rousseeuw

On the other hand, cellwise outliers are individual cells in the data matrix.

Silhouettes and quasi residual plots for neural nets and tree-based classifiers

no code implementations16 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.

Weight-of-evidence 2.0 with shrinkage and spline-binning

1 code implementation5 Jan 2021 Jakob Raymaekers, Wouter Verbeke, Tim Verdonck

We present the results of a series of experiments in a fraud detection setting, which illustrate the effectiveness of the presented approach.

Decision Making Fraud Detection

Regularized K-means through hard-thresholding

no code implementations2 Oct 2020 Jakob Raymaekers, Ruben H. Zamar

We study a framework of regularized $K$-means methods based on direct penalization of the size of the cluster centers.

Class maps for visualizing classification results

no code implementations28 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.

Classification General Classification +1

Transforming variables to central normality

no code implementations16 May 2020 Jakob Raymaekers, Peter J. Rousseeuw

Many real data sets contain numerical features (variables) whose distribution is far from normal (gaussian).

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