Figure 3From: Trustworthiness and metrics in visualizing similarity of gene expressionCapability of the visualizations to preserve the similarities (the neighborhoods of size k) of the original data space. Sammon: Sammon's mapping, NMDS: non-metric multidimensional scaling, SOM: self-organizing map, HC: hierarchical clustering, with the ultrametric distance measure and with the linear distance measure. RP: Random linear projection is the approximate worst possible practical result (the small standard deviation over different projections, about 0.01, is not shown). The theoretical worst case, estimated with random neighborhoods, is approximately M2 = 0.5. a) Yeast data. b) Mouse data.Back to article page