Gradient Boosted Trees Predictive Models for Surface Roughness in High-Speed Milling in the Steel and Aluminum Metalworking Industry

Table 11

Confusion matrix for the slots dataset M2 (GBT).

	True Smooth	True Fine	True Semi-Fine	True Medium	Class Precision
Pred. Smooth	2	1	0	66.67%	2
Pred. Fine	0	12	4	75.00%	0
Pred. Semi-fine	0	5	2	28.57%	0
Class Recall	100.00%	66.67%	33.33%	Acc: 61.54%	100.00%