Fig. 4
From: A database of steric and electronic properties of heteroaryl substituents
Statistical analysis of the heteroaryl database. (a) Principal component analysis (PCA). (b) Uniform manifold approximation and projection (UMAP) of DFT-computed descriptors showing broader distributions of heteroaryl properties than those of aryl groups. (c) z-score analysis to indicate the normalized average deviation of subsets of data points from the average values of the entire dataset.
