Fig. 4: Comprehensive analyses reveal distinct intestinal biological behavior of Lactuca lines at different stages of domestication.
From: Bioengineered intestinal tubules as a tool to test intestinal biological efficacy of lettuce species

a shows the sum of squares due to error (SSE) to find an optimal number of clusters. b shows the evaluation of the silhouette coefficient. c–e shows three different K-means visualizations of the clustering. f illustrates the results of a hierarchical clustering method.