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

Table 3

Total variances.

PC	Initial eigenvalues			Extraction sums of squared loadings			Rotation sums of squared loadings
	Total	Variance percent	Cumulative variance (%)	Total	Variance percent	Cumulative variance (%)	Total	Variance percent	Cumulative variance (%)
1	3.660	40.670	40.670	3.660	40.670	40.670	3.306	36.737	36.737
2	1.971	21.897	62.567	1.971	21.897	62.567	2.294	25.492	62.229
3	1.144	12.713	75.280	1.144	12.713	75.280	1.175	13.052	75.280
4	0.870	9.662	84.942
5	0.484	5.379	90.321
6	0.444	4.932	95.253
7	0.177	1.970	97.224
8	0.155	1.719	98.943
9	0.0195	1.057	100