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Optimization of Cost Sensitive Models to Improve Prediction of Molecular Functions

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Part of the book series: Communications in Computer and Information Science ((CCIS,volume 452))

Abstract

The prediction of unknown protein functions is one of the main concerns at field of computational biology. This fact is reflected specifically in the prediction of molecular functions such as catalytic and binding activities. This, along with the massive amount of information has made that tools based on machine learning techniques have increase their popularity in the last years. However, these tools are confronted to several problems associated to the treated data, one of them is the learning with large imbalance between their categories. There exist several techniques to overcomes the class imbalance, but most of them present many weakness that difficult the obtaining of reliable results. Moreover, models based on cost sensitive learning seems to be a good choice to deal with imbalance data, yet, the obtaining of a optimal cost matrix still remains an open issue. In this paper, a methodology to calculate a optimal cost matrix for models based on cost sensitive learning is proposed. The results show the superiority of this approach compared with several techniques in the state of the art regarding to class imbalance. Tests were applied to prediction of molecular functions in Embryophyta plants.

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Acknowledgements

This work is partially funded by the Research office (DIMA) at the Universidad Nacional de Colombia at Manizales and the Colombian National Research Centre (COLCIENCIAS) through grant No.111952128388 and the “jovenes investigadores e innovadores - 2010 Virginia Gutierrez de Pineda” fellowship.

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Correspondence to Jorge Alberto Jaramillo-Garzón .

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García-López, S., Jaramillo-Garzón, J.A., Castellanos-Dominguez, G. (2014). Optimization of Cost Sensitive Models to Improve Prediction of Molecular Functions. In: Fernández-Chimeno, M., et al. Biomedical Engineering Systems and Technologies. BIOSTEC 2013. Communications in Computer and Information Science, vol 452. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-44485-6_15

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  • DOI: https://doi.org/10.1007/978-3-662-44485-6_15

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  • Online ISBN: 978-3-662-44485-6

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