Browsing by Author "Figueroa, Ignacio"

Now showing 1 - 2 of 2
  • Thumbnail Image
    Item
    33
    (33, 33) Maldonado, Sebastián; Vairetti, Carla; Figueroa, Ignacio; 33
    As with any task, the process of building machine learning models can benefit from prior experience. Meta-learning for classifier selection leverages knowledge about the characteristics of different datasets and/or the past performance of machine learning techniques to inform better decisions in the current modeling process. Traditional meta-learning approaches first collect metadata that describe this prior experience and then use it as input for an algorithm selection model. In this paper, however, a one-step scheme is proposed in which convolutional neural networks are trained directly on tabular datasets for binary classification. The aim is to learn the underlying structure of the data without the need to explicitly identify meta-features. Experiments with simulated datasets show that the proposed approach achieves near-perfect performance in identifying both linear and nonlinear patterns, outperforming the conventional two-step method based on meta-features. The method is further applied to real-world datasets, providing recommendations on the most suitable classifiers based on the data's inherent structure.
  • Thumbnail Image
    Item
    Fear of covid-19 in the chilean population: predictors and future direction
    Figueroa, Ignacio; Landa, Catalina; Pardo, Luis; San Martín Miranda, MarÍa Consuelo; Miguez, Gonzalo; Laborda, Mario A.; Quezada-Scholz, Vanetza E.