Accuracy of MEA methods using unconstrained- Y -partition-maximisation. The ability of different MEA methods to correctly rank the known TF motif in 237 yeast ChIP-chip experiments is shown. The mean percentile rank accuracy of unconstrained-Y-partition-maximization (YUPM, blue bars) and fixed-partition (YFP, red bars, t
= 0.001) variants of four MEA methods is shown. Error bars show standard error.