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Figure 7 | Environmental Health

Figure 7

From: Using self-organizing maps to develop ambient air quality classifications: a time series example

Figure 7

Evaluation measures used to characterize 4 × 4 SOM quality. Panel (a) presents the coefficient of variation for within-class similarity in bold and the standard error/mean in parentheses. Panel (b) presents a dendrogram of SOM classes labeled with xy coordinates. Panel (c) presents a Sammon map of SOM classes labeled with xy coordinates. Panel (d) presents a multidimensional scaling projection of daily multipollutant profiles and class profiles generated from SOM, k-means, and Ward’s clustering approaches.

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