Figure 2.

Principal Components Analysis (PCA) plot of cheese samples. CTR group: five cheese wheels after 60 days of ripening obtained from the milk of dairy cows fed concentrate without olive cake supplements. OC group: five cheese wheels after 60 days of ripening obtained from the milk of dairy cows fed concentrate with olive cake supplements. Discrimination index = 59. The two principal components (PC1 and PC2) are responsible for 95.3% of the variation showed by sensor’s signals used as loadings.