Method schematic. A. An example of coexpression data for one pair of genes plotted across age groups. B. The Haar basis set is shown summing to generate the original data points from A. The solid line is the mean value (lifelong state), the dotted line shows the difference between the first half and second half (lifelong change), and the dashed line shows the difference between first and second groups then third and fourth groups (early and late change, respectively). Each successively smaller scale is graphed on top of the sum of previous scales, summing to the original.