IEEE Systems, Man and Cybernetics Magazine - April 2020 - 31

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Figure 10. The temporal plots and the corresponding NerDIs of the GNGC clustering results [82]. (a) A single
cluster is shown in red, and its convex hull is illustrated by dots. (b) More data are added to the red cluster, but
the convex hull shows little change. (c) New data are far from the red cluster causing significant change in
the convex hull. (d) The NerDI image displays a single cluster. (e) The NerDI image still shows the presence of
a single cluster. (f) The NerDI plots highlight a high dissimilarity between the points in the red convex hull by
two dark blocks along the diagonal. (g) More newly arriving data are far away from the original cluster shown
in (a). (h) The data now have two clusters (red and green), each having a separate convex hull. (i) With the
arrival of new points, a new blue cluster is carved out of the green cluster. (j) The two dark blocks along the
diagonal have comparable sizes. (k) The NerDI image now has two blocks (red and green) for two separate
clusters. (l) The NerDI image reveals three clusters by different colored (red, green, and blue) blocks.
	

Ap ri l 2020

IEEE SYSTEMS, MAN, & CYBERNETICS MAGAZINE	

31



IEEE Systems, Man and Cybernetics Magazine - April 2020

Table of Contents for the Digital Edition of IEEE Systems, Man and Cybernetics Magazine - April 2020

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IEEE Systems, Man and Cybernetics Magazine - April 2020 - Cover3
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