[BioC] Re:limma

[daniela.marconi at libero.it]

Hi
 I'm using limma for an affymetrix dataset. 
For summarize which is the most relavant differential expressed genes I use classifyTestsF() and I extract up-regulated and down-regulated genes. At the same time i look at the results of the fit with topTable()  (sorted by B). But the genes are different. Is it  possible? Why? Is B (probability log odds) a god estimator?
 What is the better solution, to summarize my results, between B and F-statistics?
 Thanks 
 Daniela Marconi