An open-source tool to identify active travel from hip-worn accelerometer, GPS and GIS data

Table 2 The confusion-matrix and accuracy scores per mode, expressed as percentages, for the cross-validated model

		Observed mode					Mode	Positive predictive value^a	Sensitivity^b	F1 score^c
		Cycle	Walk	Train	Vehicle	Stationary	Mode	Positive predictive value^a	Sensitivity^b	F1 score^c
Predicted mode	Cycle	8062	33	5	328	20	Cycle	95.4	96.2	95.8
	Walk	10	9171	21	32	357	Walk	95.6	92.3	93.9
	Train	3	18	12,296	95	18	Train	98.9	97.5	98.2
	Vehicle	260	6	139	20,911	159	Vehicle	97.4	96.9	97.1
	Stationary	47	710	155	214	45,317	Stationary	97.6	98.8	98.2

^aPositive predictive value (PPV) or Precision, the ratio of true positives to the sum of true and false positives
^bSensitivity or Recall/ True positive rate/Detection rate, the ratio of true positive to true positives and false negatives
^cF1 score, the harmonic mean of PPV and sensitivity

ISSN: 1479-5868