Railroad Track Deterioration Characteristics Based Track Measurement Data Mining

Table 2

Error statistics for the twist predictions.

Date	Mean (mm)	Standard deviation (mm)	Mean absolute error (mm)
Sep. 24	−0.0070	0.6156	0.3783
Oct. 10	0.0099	0.5360	0.3174
Oct. 30	−0.0033	0.4442	0.2606
Nov. 13	−0.0020	0.5549	0.3592
Dec. 12	0.0016	0.7457	0.4952
Dec. 25	0.0006	0.5979	0.3998