Bioplot for the correlation between volatile constituents and E-nose sensors. The compounds are 30 selected characteristic constituents, labeled from one to 30. These compounds are as follows: (1) ethyl oleate; (2) naphthalene, 1,2,3,5,6,8a-hexahydro-4,7-dimethyl-1-(1-methylethyl); (3) α-selinene; (4) phthalic acid, butyl isohexyl ester; (5) 10,13-octadecadienoic acid, methyl ester; (6) linoleic acid methyl ester; (7) cyclooctene, 4-methylene-6-(1-propenylidene); (8) nerolidol; (9) calarene; (10) viridiflorol; (11) 9,17-octadecadienal; (12) β-neoclovene ; (13) γ-muurolene; (14) espatulenol; (15) γ-pyronene; (16) α-gurjunene; (17) β-caryophyllene; (18) β-sesquiphellandrene; (19) alloaromadendrene; (20) α-bergamotene; (21) α-copaene; (22) hinesol; (23) α-curcumene; (24) α-calacorene; (25) guaiol; (26) γ-gurjunene; (27) octanal; (28) β-farnesene; (29) β-panasinsene; (30) γ-selinene. The 18 E-nose sensors are P10/1, P10/2, P30/1, P40/1, P40/2, P30/1, PA/2, T70/2, T40/2, TA/2, T40/1, LY2/AA, LY2/LG, LY2/GCTL, LY2/GCT, LY2/G, and LY2/GH.