normalizeData: Normalization of RNA-Seq count data.
Description
Normalizes RNA-seq count data using previously published
approaches. Each samples' read counts are corrected by a
normalizing factor. The options are "RLE" by (Anders and
Huber, 2010), and "upperquartile" by (Bullard et al.,
2010).
Usage
normalizeData(X, normalization)
Arguments
X
data a raw data matrix, where' columns are
interpreted as samples and rows as genomic regions.
normalization
method used for normalizing the
reads. RLE is the method used by (Anders and Huber,
2010), upperquartile is the Upper-Quartile method from
(Bullard et al., 2010), and none deactivates
normalization. (Default = "RLE").
Value
"list" A list containing the normalized data (in its "X"
component) as well as the size-factors used for the
normalization ("sizeFactors").
References
Anders, S. and Huber, W. (2010). Differential
expression analysis for sequence count data. Genome
Biol, 11(10), R106.
Bullard, J. H., Purdom, E., Hansen, K. D., and Dudoit, S.
(2010). Evaluation of statistical methods for
normalization and differential expression in mRNA-seq
experiments. BMC Bioinformatics, 11, 94.