Additional file 4.
Table S2 - optimal clustering numbers of the total dataset. (a) The optimal number of clusters obtained by Silhouette index/Calinski-Harabasz (CH) score. (b) The actual observed CH score. (c) The observed maximum Silhouette index. This is repeated at five taxonomic levels using four different distance methods. Note that Unifrac distance can only be measured at the OTU level.
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Hildebrand et al. Genome Biology 2013 14:R4 doi:10.1186/gb-2013-14-1-r4