no code implementations • 6 Jan 2020 • Javier Trejos-Zelaya, Luis Eduardo Amaya-Briceño, Alejandra Jiménez-Romero, Alex Murillo-Fernández, Eduardo Piza-Volio, Mario Villalobos-Arias
We study clustering methods for binary data, first defining aggregation criteria that measure the compactness of clusters.
no code implementations • 2 Dec 2019 • Jeffry Chavarria-Molina, Juan Jose Fallas-Monge, Javier Trejos-Zelaya
An ant colony optimization approach for partitioning a set of objects is proposed.
no code implementations • 20 Nov 2019 • Andres Quiros-Granados, Javier Trejos-Zelaya
Nonlinear regression models of Nelson-Siegel and Svensson were used to estimate the yield curve using a sample of historical data supplied by the National Stock Exchange of Costa Rica.