Kerfdr: a semi-parametric kernel-based approach to local false discovery rate estimation

Abstract : Background The use of current high-throughput genetic, genomic and post-genomic data leads to the simultaneous evaluation of a large number of statistical hypothesis and, at the same time, to the multiple-testing problem. As an alternative to the too conservative Family-Wise Error-Rate (FWER), the False Discovery Rate (FDR) has appeared for the last ten years as more appropriate to handle this problem. However one drawback of FDR is related to a given rejection region for the considered statistics, attributing the same value to those that are close to the boundary and those that are not. As a result, the local FDR has been recently proposed to quantify the specific probability for a given null hypothesis to be true. Results In this context we present a semi-parametric approach based on kernel estimators which is applied to different high-throughput biological data such as patterns in DNA sequences, genes expression and genome-wide association studies. Conclusion The proposed method has the practical advantages, over existing approaches, to consider complex heterogeneities in the alternative hypothesis, to take into account prior information (from an expert judgment or previous studies) by allowing a semi-supervised mode, and to deal with truncated distributions such as those obtained in Monte-Carlo simulations. This method has been implemented and is available through the R package kerfdr via the CRAN or at http://stat.genopole.cnrs.fr/software/kerfdr
Type de document :
Article dans une revue
BMC Bioinformatics, BioMed Central, 2009, 10, pp.84
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Contributeur : Grégory Nuel <>
Soumis le : mercredi 24 novembre 2010 - 15:48:31
Dernière modification le : mercredi 29 novembre 2017 - 15:51:11

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  • HAL Id : hal-00539551, version 1

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M. Guedj, S. Robin, A. Celisse, Gregory Nuel. Kerfdr: a semi-parametric kernel-based approach to local false discovery rate estimation. BMC Bioinformatics, BioMed Central, 2009, 10, pp.84. 〈hal-00539551〉

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