Výsledky vyhledávání - "Cawley, Gavin"

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The Temporal Dictionary Ensemble (TDE) Classifier for Time Series Classification

Autor: Middlehurst, Matthew, Large, James, Cawley, Gavin, Bagnall, Anthony

Publikováno v: ECML PKDD 2020: Machine Learning and Knowledge Discovery in Databases, pages 660-676, 2020

Using bag of words representations of time series is a popular approach to time series classification. These algorithms involve approximating and discretising windows over a series to form words, then forming a count of words over a given dictionary.

Externí odkaz: http://arxiv.org/abs/2105.03841

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Nested cross-validation when selecting classifiers is overzealous for most practical applications

Autor: Wainer, Jacques, Cawley, Gavin

When selecting a classification algorithm to be applied to a particular problem, one has to simultaneously select the best algorithm for that dataset \emph{and} the best set of hyperparameters for the chosen model. The usual approach is to apply a ne

Externí odkaz: http://arxiv.org/abs/1809.09446

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On the Use of Default Parameter Settings in the Empirical Evaluation of Classification Algorithms

Autor: Bagnall, Anthony, Cawley, Gavin C.

We demonstrate that, for a range of state-of-the-art machine learning algorithms, the differences in generalisation performance obtained using default parameter settings and using parameters tuned via cross-validation can be similar in magnitude to t

Externí odkaz: http://arxiv.org/abs/1703.06777

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