[BioC] 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 not the same. Is it  possible? Why?
What is the better solution, to summarize my results, between B and F-statistics?
Thanks 
Daniela Marconi