Comparison of individual normalized maps of the distance between asymptotes ( UA-LA ) and SWA in baseline sleep. Left: Differences (Manhattan distances; see Methods) between all pairs of maps plotted as a gray-scale coded matrix. Smallest distances were present within individuals (diagonal). Numbers denote individuals. Right: Distribution (boxplot) of within (N = 8) and between (N = 56) subject differences (Manhattan distance). Within subject differences were significantly lower than between subject differences (notch areas do not overlap). For details about the representation of boxplots see Figure 3.