Figure 1
From: Area under the expiratory flow-volume curve: predicted values by artificial neural networks
Shadowgrams (overlayed histograms with various X axis bin widths) of AEX by gender and race/ethnicity. To understand the concept of a shadowgram, consider that if the bin width (on the X axis) of a histogram is different, its appearance changes. As such, a shadowgram overlays histograms with different bin widths. Dominant features of the distribution are less transparent on a shadowgram. B black, W white, F females, M males. Color codes—dark green: blacks; light green: whites.
