no code implementations • 31 Jan 2024 • Rafael Blanquero, Emilio Carrizosa, Pepa Ramírez-Cobo, M. Remedios Sillero-Denamiel
The Lasso has become a benchmark data analysis procedure, and numerous variants have been proposed in the literature.
no code implementations • 31 Jan 2024 • Rafael Blanquero, Emilio Carrizosa, Pepa Ramírez-Cobo, M. Remedios Sillero-Denamiel
However, features are usually correlated, a fact that violates the Na\"ive Bayes' assumption of conditional independence, and may deteriorate the method's performance.
no code implementations • 25 Jan 2024 • Pepa Ramírez-Cobo, Emilio Carrizosa, Rosa Elvira Lillo
Given a real operational risk database, the aggregate loss model is estimated by fitting separately the inter-losses times and severities.
no code implementations • 15 Jan 2024 • Sandra Benítez-Peña, Rafael Blanquero, Emilio Carrizosa, Pepa Ramírez-Cobo
The relevance of features in a classification procedure is linked to the fact that misclassifications costs are frequently asymmetric, since false positive and false negative cases may have very different consequences.
no code implementations • 22 Dec 2023 • Sandra Benítez-Peña, Rafael Blanquero, Emilio Carrizosa, Pepa Ramírez-Cobo
Such maximal margin hyperplane is obtained by solving a quadratic convex problem with linear constraints and integer variables.
no code implementations • 9 Oct 2023 • Sandra Benítez-Peña, Rafael Blanquero, Emilio Carrizosa, Pepa Ramírez-Cobo
Classification in SVM is based on a score procedure, yielding a deterministic classification rule, which can be transformed into a probabilistic rule (as implemented in off-the-shelf SVM libraries), but is not probabilistic in nature.