Evaluation of the Total Quality of Tunnel Contour Using Projection Pursuit Dynamic Cluster Method

Table 3

Relational order of point indices.

Relational order between X1 and others		Relational order between X2 and others		Relational order between X3 and others		Relational order between X4 and others
Index	Correlation coefficient	Index	Correlation coefficient	Index	Correlation coefficient	Index	Correlation coefficient
X3	0.9562	X4	0.8209	X1	0.9563	X2	0.8259
X2	0.8022	X1	0.7962	X2	0.7928	X1	0.7583
X4	0.7577	X3	0.7861	X4	0.7511	X3	0.7511