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. Author manuscript; available in PMC: 2015 Feb 23.
Published in final edited form as: IEEE Trans Biomed Eng. 2014 Sep;61(9):2389–2395. doi: 10.1109/TBME.2014.2311387

Fig. 4.

Fig. 4

Morphological Feature Distributions. Distribution APD30 (first column), APD80 (second column), triangulation (APD90 – APD30) (third column), and normalized triangulation (APD90APD30APD90), rightmost column), for the spectral grouping result using 2 (top row), 3 (middle row), and 4 (bottom row) groups. The two group segmentation suggest two unique phenotypes in APD30, APD80, and normalized triangulation.