Skip to main content
. 2019 Nov 16;19(22):5010. doi: 10.3390/s19225010

Table 8.

Results of PLSR for the standard analytical and sensory parameters predicted by ET and NIRS for the storage data set.

Electronic Tongue NIRS
Parameters Latent Variables Data Points R2C RMSEC R2CV RMSECV Latent Variables Data Points R2C RMSEC R2CV RMSECV
Standard analytical properties Brix° 1 50 0.816 0.6806 0.8002 0.7088 12 26 0.9992 0.0459 0.8144 0.6827
β-carotene 4 44 0.4975 22.1737 0.3256 25.6006 15 31 0.9424 8.5495 −0.012 35.83
Cis-β-carotene 4 44 0.6083 2.4284 0.4579 2.8537 15 32 0.9009 1.3535 −0.7949 5.7594
Lutein 2 44 0.4167 0.1119 0.2942 0.123 6 34 0.6707 0.0789 0.3939 0.1071
Mutatoxanthin 4 44 0.5812 0.0611 0.3668 0.075 15 35 0.9488 0.0197 −0.7132 0.1138
Phytoene 3 44 0.5141 0.509 0.3423 0.5912 15 32 0.9233 0.2114 −1.0245 1.0861
Phytofluene 3 44 0.4029 0.7909 0.2069 0.9103 15 31 0.8681 0.3804 −2.5857 1.9833
Total carotene 4 44 0.5446 22.9254 0.3812 26.6193 15 31 0.9717 6.3529 0.3484 30.486
Violaxanthin 2 44 0.3022 0.092 0.1165 0.1034 15 30 0.9653 0.0209 0.0226 0.111
Vitamin C 2 26 0.6897 34.9167 0.6054 39.3004 15 25 0.9684 9.3388 −1.5506 83.949
ζ-carotene 4 44 0.7914 1.0283 0.6613 1.3087 15 32 0.8962 0.675 −5.037 5.1466
Sensory properties Aftertaste 1 60 0.7987 13.8018 0.7849 14.2621 10 57 0.9465 7.0339 0.8525 11.68
Flesh color 2 60 0.4079 9.2906 0.3198 9.9535 10 56 0.8184 5.2774 −0.0275 12.552
Fermented taste 1 60 0.7665 2.2761 0.7496 2.3565 10 61 0.906 1.4383 0.7737 2.2312
Fermented aroma 1 60 0.4747 3.9534 0.4355 4.0971 10 56 0.8635 1.9815 0.6549 3.1509
Melon aroma 2 60 0.7297 5.0735 0.6945 5.3917 10 54 0.9605 1.9787 0.8641 3.672
Sweet aroma 3 60 0.7556 6.0293 0.7136 6.5138 10 61 0.8868 4.0793 0.7286 6.3175
Sweet taste 1 60 0.8038 9.1659 0.7901 9.4765 10 59 0.9458 4.7997 0.8503 7.975
Taste persistency 2 60 0.772 9.4545 0.7433 10.028 10 54 0.9438 4.6644 0.8334 8.0325
Texture 1 60 0.7651 10.1466 0.748 10.5051 10 61 0.9056 6.4052 0.7737 9.9156
Juiciness 1 60 0.7738 15.3924 0.7574 15.9337 10 61 0.9036 10.009 0.745 16.279