PCA of antibiotic resistance and heavy metal tolerance among sewage wastewater bacteria: (a) variable projection of F1 and F2 factors (antibiotics and heavy metals); (b) projection of six sewage bacterial isolates in F1 and F2 factors.

source: Mandal, M., Das, S. N., & Mandal, S. (2020). Principal component analysis exploring the association between antibiotic resistance and heavy metal tolerance of plasmid-bearing sewage wastewater bacteria of clinical relevance. Access Microbiology, 2(3), e000095.