Fig. 4
From: On the analysis of clonogenic survival data: Statistical alternatives to the linear-quadratic model
Cluster analysis of the clonogenic survival data discloses groups of radioresistant and sensitive cells. Euclidean distances of the nine cell lines were analyzed by means of agglomerative hierarchical clustering of original SF data (a, b), log-transformed SF data (b, c), and SF2 values only (d, e). Dendrograms (a, c, e): a two-cluster solution with a group of radioresistant and a group of sensitive cell lines can be identified. The silhouette plots (b, d, f) display a good quality of the obtained two-cluster solution