Fig. 4From: MetICA: independent component analysis for high-resolution mass-spectrometry based non-targeted metabolomicsSelection of optimal cluster number. a The evolution of the geometric index average inner/between cluster distance as a function of number of clusters. The index is smallest at c=13, meaning the most compact and well-separated clusters. b The distribution of clusters (one color = one cluster) on the 2D space of CCA. It provides a visual confirmation for c Back to article page