A Multiscale Approach for Free-Float Bike-Sharing Electronic Fence Location Planning: A Case Study of Shenzhen City

Table 3

Evaluation of K-means clustering results.

Number of clusters	WCSS	Silhouette coefficient	CH index
2	0.141618843	0.638730861	2.17E + 04
3	0.093614393	0.570297238	1.79E + 04
4	0.069217715	0.593869516	1.52E + 04
5	0.049983302	0.641208203	1.45E + 04
6	0.035292187	0.668650703	1.94E + 04
7	0.029886923	0.633170025	1.82E + 04
8	0.025853272	0.623774029	1.72E + 04
9	0.022547654	0.629040005	1.55E + 04
10	0.020072251	0.630456264	1.47E + 04