Principle component analysis explained further the multidimensional
relationship among the roasted coffee beans. In
Fig. 2, 79% of the variation in the data were explained by PC1 (63%)
and PC2 (16%). The biplot confirmed that burnt/acrid, ashy/sooty,
sour aromatics, and pungent were the characteristics of dark
roasted beans. Because the dark roasted Hawaii Kona bean was
characterized by the sweet aromatic attribute, it was pulled away
from the rest of the dark roasted samples towards the middle of the
sensory space. Medium roasted beans of Hawaii Kona and Ethiopia
Kebado were perceived to be cocoa, nutty, and sweet, which was in
line with the mean table, but also were high in the brown note. The
medium roasted El Salvador Bourbon bean sample was placed right
in the middle of the sensory space which indicated that aroma
attributes perceived from this sample were in harmony with each
other, making it complex and more difficult to discern any differences.
Lastly, light roasted beans were characterized by beany and
green