PCA is an exploratory technique which reduces the multidimensional
data set (70 blossom volatiles) to lower dimensions or principal
components which are comprised of linear combinations of
variables (individual volatiles). This helps identify inherent patterns
in the data in an unbiased way and highlights the similarities
and differences amongst samples (citrus cultivars). It also helps
identify those volatiles which are most differentiating within the
entire data set.