particularly for white vinho verde wine, which is the most common
type. When admitting only the correct classified classes (T=0.5), the
overall accuracies are 62.4% (red) and 64.6% (white). It should be
noted that the datasets contain six/seven classes (from 3 to 8/9).
These accuracies are much better than the ones expected by a random
classifier. The performance is substantially improved when the
tolerance is set to accept responses that are correct within the one
of the two nearest classes (T=1.0), obtaining a global accuracy of
89.0% (red) and 86.8% (white). In particular, for both tasks the
majority of the classes present an individual accuracy (precision)
higher than 90%.