Search Results for author: Solt Kovács

Found 5 papers, 2 papers with code

Random Forests for Change Point Detection

2 code implementations10 May 2022 Malte Londschien, Peter Bühlmann, Solt Kovács

However, the method can be paired with any classifier that yields class probability predictions, which we illustrate by also using a k-nearest neighbor classifier.

Change Point Detection

Graphical Elastic Net and Target Matrices: Fast Algorithms and Software for Sparse Precision Matrix Estimation

no code implementations6 Jan 2021 Solt Kovács, Tobias Ruckstuhl, Helena Obrist, Peter Bühlmann

We consider estimation of undirected Gaussian graphical models and inverse covariances in high-dimensional scenarios by penalizing the corresponding precision matrix.

Methodology Computation

Optimistic search: Change point estimation for large-scale data via adaptive logarithmic queries

no code implementations20 Oct 2020 Solt Kovács, Housen Li, Lorenz Haubner, Axel Munk, Peter Bühlmann

Change point estimation is often formulated as a search for the maximum of a gain function describing improved fits when segmenting the data.

Change Point Detection

Seeded intervals and noise level estimation in change point detection: A discussion of Fryzlewicz (2020)

no code implementations23 Jun 2020 Solt Kovács, Housen Li, Peter Bühlmann

In this discussion, we compare the choice of seeded intervals and that of random intervals for change point segmentation from practical, statistical and computational perspectives.

Methodology Computation

Change point detection for graphical models in the presence of missing values

1 code implementation11 Jul 2019 Malte Londschien, Solt Kovács, Peter Bühlmann

We propose estimation methods for change points in high-dimensional covariance structures with an emphasis on challenging scenarios with missing values.

Change Point Detection Imputation +3

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