Figure 1From: Kernel density weighted loess normalization improves the performance of detection within asymmetrical dataMA plot for S and C samples Each probe set is first summarized with the median intensity. The three constant samples are averaged as the C signals while the three spike-in samples are averaged as the S signals. The MA plot is then plotted with the difference between S and C versus the average of S and C. The color scheme is associated with the nominal fold change. Genes of the same fold change are fitted with a smoothing spline curve.Back to article page