Kernel Local Linear Discriminate Method for Dimensionality Reduction and Its Application in Machinery Fault Diagnosis

Table 3

Distances between each point of rolling bear dataset1.

	𝑥1	𝑥2	⋯	𝑥40	𝑥41	𝑥42	⋯	𝑥80	⋯	𝑥121	𝑥122	⋯	𝑥160
𝑥1	0.0000	0.0062		0.0206	3.9698	3.9639		3.8892		3.3080	303006		3.0511
𝑥2	0.0062	0.0000	⋯	0.0482	4.1455	4.1385	⋯	4.0637	⋯	3.3738	3.3704	⋯	3.1379
⋮	⋮	⋮	⋮	⋮	⋮	⋮	⋮	⋮	⋮	⋮	⋮	⋮	⋮
𝑥40	0.0206	0.0482	⋯	0.0000	3.6692	3.6591	⋯	3.5795	⋯	3.1847	3.1706	⋯	2.8929
𝑥41	3.9698	4.1455	⋯	3.6692	0.0000	0.0083	⋯	0.0442	⋯	2.3464	2.2919	⋯	2.1105
⋮	⋮	⋮	⋮	⋮	⋮	⋮	⋮	⋮	⋮	⋮	⋮	⋮	⋮
𝑥80	3.8892	4.0637	⋯	3.5795	0.0442	0.0153	⋯	0.0000	⋯	2.1124	2.0596	⋯	1.8712
⋮	⋮	⋮	⋮	⋮	⋮	⋮	⋮	⋮	⋮	⋮	⋮	⋮	⋮
𝑥160	3.0511	3.1379	⋯	2.8929	2.1105	1.9920	⋯	1.8712	⋯	0.0322	0.0239	⋯	0.0000