Figure 4From: Empirical characterization of the expression ratio noise structure in high-density oligonucleotide arraysComparison of the signal-to-noise ratios (SN) for the PM and PM-MM methods. Only genes with Ngood > 4 in the PM-MM method are plotted. The red lines are contour lines and the blue lines denote the diagonal and SN values of 2 on either axis.Back to article page