Fig. 1
From: Multivariate Analysis of ToF-SIMS Data from Multicomponent Systems: The Why, When, and How
PCA scores and loadings from a set of dark chocolate samples. a PCA PC1 scores. The black squares represent the 95Â % confidence limits for each sample. Samples are separated from each other on the PC1 axis. b PCA PC1 loadings plot. Peaks with positive loadings correspond with samples with positive scores. Peaks with negative loadings correspond with samples with negative scores