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. 2019 Feb 13;10:120. doi: 10.3389/fpls.2019.00120

FIGURE 8.

FIGURE 8

Principal Component Analysis (PCA) in positive (A) and negative (B) ionization mode of LC-HRMS data of hemp seed oils. Samples are named as “oil_number” (e.g., oil_1); the colored ellipsoids represent the 95% confidence region. Partial Least Squares Discriminant Analysis (PLS-DA) in positive (C) and negative (D) ionization mode of the LC-HRMS data of hemp seed oils. PLS-DA is performed by rotating the PCA components in order to obtain the maximum separation among the groups. Validation parameters: R2 = 0.915; Q2 = 0.755.