[BioC] backgroundCorrect(method="normexp") problems

[Gordon Smyth]

You'll see this question asked a few times in the mailing list archives. 
Try upgrading your version of the limma package.

Gordon

>Date: Thu, 28 Apr 2005 16:44:41 -0400
>From: "Palmer, Lance" <palmer at cshl.edu>
>Subject: [BioC] backgroundCorrect(method="normexp")  problems
>To: <bioconductor at stat.math.ethz.ch>
>
>I am just starting to do microarray analysis.  I have been trying to 
>normalize 4 chips (two dye-swap experiments done in biological replicates)
>
>After doing backgroundCorrect(method="normexp") , one of the arrays has 
>all of its $G values at NaN.
>
>This does not happen when any other method is used.
>
>Can someone tell me why this is, and if this can be fixed?
>
>Thanks
>Lance Palmer