Hi Daryl,
This dataset is from a microarray platform (GSE72865 is tagged as Platform: GPL10558 Illumina HumanHT-12 V4.0 expression beadchip) and not a sequencing based one. The both Voom and DESeq2 expect counts from RNA-seq so Voom failing is expected, and DESeq2 should as well (or would return a non-statistically valid result). I believe that the correct module to analyze this data would be the ComparativeMarkerSelection tool, but any of my colleagues here can feel free to chime in and correct me.
-Anthony
Anthony S. Castanza, PhD
Curator, Molecular Signatures Database
Mesirov Lab, Department of Medicine
University of California, San Diego
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