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FDR analyses: minimum number of features

Have you considered Monte Carlo?  From previous work, you could 
estimate a distribution for the differences to be detected and use that 
as input to a Monte Carlo, computing thereby a distribution for FDR as a 
function of distribution of differences and the number of features. 
 From this, you could estimate probabilities for obtaining results that 
were bogus vs. marginal, barely useful vs. highly accurate and plot them 
vs. alternative budgets, etc.

	  I hope this comment makes more sense than my earlier nonsense.

	  spencer graves
Dupont, William wrote: