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Metric-Based Model Selection For Time-Series Forecasting

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  • Yoshua Bengio
  • Nicolas Chapados

Abstract

Metric-based methods, which use unlabeled data to detect gross differences in behavior away from the training points, have recently been introduced for model selection, often yielding very significant improvements over alternatives (including cross-validation). We introduce extensions that take advantage of the particular case of time-series data in which the task involves prediction with a horizon "h"". The ideas are (i) to use at ""t"" the ""h"" unlabeled examples that precede ""t"" for model selection, and (ii) take advantage of the different error distributions of cross-validation and the metric methods. Experimental results establish the effectiveness of these extensions in the context of feature subset selection." Les méthodes métriques, et qui utilisent des données non-étiquetées pour détecter les différences brutes pour les comportements loin des pointes d'entrainement, ont été récemment introduites pour la sélection de modèles, apportant une amélioration dans beaucoup de cas (incluant la validation croisée). Nous présentons des prolongements à ces méthodes qui prennent avantage du cas particulier des séries temporelles pour lesquelles la tâche consiste en une prédiction avec un horizon "h"". Les idées sont (i) d'utiliser au temps ""t"" les ""h"" exemples non-étiquetés qui précèdent ""t"", et (ii) profiter des différentes distributions d'erreur de validation croisée et de méthodes métriques. Des résultats expérimentaux établissent l'efficacité de ces prolongements dans le contexte de la sélection d'un sous-ensemble de caractéristiques."

Suggested Citation

  • Yoshua Bengio & Nicolas Chapados, 2003. "Metric-Based Model Selection For Time-Series Forecasting," CIRANO Working Papers 2003s-24, CIRANO.
  • Handle: RePEc:cir:cirwor:2003s-24
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