Dear Rory,

Sorry, I didn't intend to make this change to the release version. I over-looked it amongst some documentation updates that I did want to make. I have fixed the release code (version 3.2.2) so that DGEList() will accept a NULL value again for lib.size.

Just a note on terminology. In edgeR terminology, the "effective library size" is the normalized library size, the product lib.size*norm.factors. The default value for lib.size is colSums(counts), which is the actual total rather than the effective total.

Best wishes
Gordon

Date: Wed, 10 Apr 2013 10:54:14 +0000
From: Rory Stark <rory.st...@cruk.cam.ac.uk>
To: "bioc-devel@r-project.org" <bioc-devel@r-project.org>
Subject: [Bioc-devel] Change in edgeR interface in released version...

I noticed that DiffBind had suddenly broken, and the culprit turned out to be a change in the edgeR interface in the released version (3.2.1). In DGEList, libsize can no longer be passed in as NULL to use the effective library size - it either must be missing, or you need to fill in the effective library sizes yourself.

-R


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