Estimate size factors
Calculate the size factor.
A data.frame or a matrix of counts in which a row represents for a gene and a column represents for a sample. There must be at least two columns in countsTable.
Anders, S. and Huber, W. (2010). Differential expression analysis for sequence count data. Genome Biology, 11, R106.
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#load a simulated data that includes a count table data("countsTable"); getNormFactor(countsTable);