A Prediction Model for Top-Coal Drawing Capability in Steep Seams Based on PCA–GRNN

Table 6

Performance test results of each model.

No.	Actual level	GRNN	Random forest	PCA–GRNN
21	A	A	A	A
22	A	B	A	A
23	B	B	C	B
24	B	B	B	B
25	C	C	C	C