Journal of Analytical Methods in Chemistry / 2014 / Article / Fig 7

Research Article

Global Clustering Quality Coefficient Assessing the Efficiency of PCA Class Assignment

Figure 7

Quadratic discriminant analysis performed with the (PC1, PC2) scores associated with stimulant amphetamines (class M), hallucinogens (class T), and negatives (class N) in the case of unprocessed spectra.