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This should be "where b and e were the median intensities."

Posted by srp33 on 01 May 2008 at 01:23 GMT

where b and d were the median intensities
http://ploscompbiol.org/article/info:doi/10.1371/journal.pcbi.0030196#article1.body1.sec2.sec2.p3

I got confused in trying to understand the algorithm until I realized this was a mistake (unless I'm totally misunderstanding what you meant).