Table 2.

Mean absolute percentage error for the proposed estimation method by task type.

Task	Random forest (%), mean absolute percentage error (SD)	Support vector machine (%), mean absolute percentage error (SD)	Gradient boosting (%), mean absolute percentage error (SD)	k-nearest neighbors (%), mean absolute percentage error (SD)
Tap	12.03 (0.51)	10.74 (0.65)	10.91 (0.63)	11.64 (1.19))
Flick	13.24 (0.55)	11.75 (0.77)	11.94 (0.61)	12.01 (1.25)
Drag	13.02 (0.87)	11.55 (0.71)	11.88 (0.86))	11.69 (0.77)
All	11.87 (0.36)	8.91 (0.57)	10.47 (0.84)	10.15 (1.25)