Please use this identifier to cite or link to this item: http://hdl.handle.net/10773/16702
Title: Arrow plot and correspondence analysis maps for visualizing the effects of background correction and normalization methods on microarray data
Author: Silva, Carina
Freitas, Adelaide
Roque, Sara
Sousa, Lisete
Keywords: Arrow plot
Background correction methods
Correspondence analysis
Differentially expressed genes
Microarray data
Normalization methods
Significance analysis of microarrays
Issue Date: 2016
Publisher: Wiley
Abstract: Among various available array technologies, double-channel cDNA microarray experiments provide numerous technical protocols associated with functional genomic studies. The chapter begins by detailing the arrow plot, which is a recent graphical-based methodology to detect differentially expressed (DE) genes, and briefly mentions the significance analysis of microarrays (SAM) procedure, which is, in contrast, quite well known. Next, it introduces the correspondence analysis (CA) and explains how the resultant graphic can be interpreted. Then, CA in both class comparison and class prediction applications and over the data sets lymphoma (lym), lung (lun), and liver (liv) is executed. The CA is applied to all three databases in order to obtain graphical representations of background correction (BC) and normalization (NM) profiles in a two-dimensional reduced space. Whenever possible, more than one preprocessing strategy on microarray data could be applied and results from preprocessed data should be compared before any conclusion and subsequent analysis.
URI: http://hdl.handle.net/10773/16702
DOI: 10.1002/9781119078845.ch21
ISBN: 978-1-118-89368-5
Appears in Collections:CIDMA - Capítulo de livro

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