Irnawati, I., Riswanto, F.D.O., Riyanto, S., Martono, S. and Rohman, A. 2021. The use of software packages of R factoextra and FactoMineR and their application in principal component analysis for authentication of oils. Indonesian Journal of Chemometrics and Pharmaceutical Analysis. 1, 1 (Feb. 2021), 1-10. DOI:https://doi.org/10.22146/ijcpa.482.