FIG. 4.

Significant scale-space trends for three selected patients. Gray dots are blood glucose measurements, the y-axis is cropped for visibility, and black vertical lines indicate measurements above the selected range. Black smooth lines are kernel regression functions using linear least squares regression with a quartic kernel function and bandwidths in hours as indicated in the individual panels. Red segments show a significant decreasing trend at the given scale, and blue segments indicate a significant increasing trend. The scales shown are chosen based on the full c-SiZer plots such that most significant trends are shown, although some details on the very smallest scales are omitted for clarity. Bandwidth is here defined as half of the support of the kernel.