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. Author manuscript; available in PMC: 2016 Aug 29.
Published in final edited form as: IEEE Trans Inf Technol Biomed. 2012 May 16;16(5):809–822. doi: 10.1109/TITB.2012.2199570

Fig. 2.

Fig. 2

Illustration of hierarchical clustering of seven samples, each with Formula genes. Gene expression is usually represented by a heatmap. Two large clusters emerge in this example. One cluster, shaded in yellow, contains samples 1, 2, 3, and 4. The second cluster, shaded in blue, contains samples 5, 6, and 7. Each cluster, in turn, contains smaller clusters of 1 or 2 samples.