DESeqDataSet object from a Collection
Source:R/method-differentialAbundance.R
DESeqDataSetFromCollection.RdDESeqDataSet is a subclass of RangedSummarizedExperiment,
used to store the input values, intermediate calculations and results of an
analysis of differential expression. The DESeqDataSet class
enforces non-negative integer values in the "counts" matrix stored as
the first element in the assay list.
In addition, a formula which specifies the design of the experiment must be provided.