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PLS-DA bi-plot of the headspace fraction of cooked (■) and rehydrated air-dried (▲), vacuum-dried (●) and freeze-dried (▼) beans. The open circles are the volatile compounds among which the discriminant compounds are marked in bold. The correlation loading for the Y variable is represented by the vector. The percentages of X and Y variance explained by each latent variable are indicated on the respective axes.
