Statistics Papers
Document Type
Journal Article
Date of this Version
9-2010
Publication Source
Biometrika
Volume
97
Issue
3
Start Page
631
Last Page
645
DOI
10.1093/biomet/asq025
Abstract
We discuss the problem of detecting local signals that occur at the same location in multiple one dimensional noisy sequences, with particular attention to relatively weak signals that may occur in only a fraction of the sequences. We propose statistics that combine data across sequences and show that they have better power properties and provide a more easily interpreted summary of the data than do procedures based on a separate analysis for each sequence. In particular, we examine the case where the signal is a temporary shift in the mean of independent Gaussian observations. The formulation of the model is motivated by the problem of detecting recurrent DNA copy number variants in multiple samples, and our results are illustrated by applications to data involving DNA copy number changes.
Copyright/Permission Statement
This is a post-peer-review, pre-copyedit version of an article published in Biometrika.
Keywords
boundary crossing, changepoint detection, DNA copy number, meta-analysis, scan statistic, segementation
Recommended Citation
Zhang, N., Siegmund, D. O., Ji, H. P., & Li, J. (2010). Detecting Simultaneous Change-Points in Multiple Sequences. Biometrika, 97 (3), 631-645. http://dx.doi.org/10.1093/biomet/asq025
Date Posted: 27 November 2017
This document has been peer reviewed.