Table 1.

Misclassification rates for binary classification trees differentiating between cattle grazing and non-grazing activities based upon synchronized GPS collar and direct observation data collected for yearling steers grazing shortgrass steppe in eastern Colorado during 2008–2011. The final selected model is shown in bold, and presented in Figure 2.

Number of Model Splits	r2	Misclassification Rate
		Training Data			Validation Data
		Overall	False		Overall	False
			Negatives	Positives		Negatives	Positives
4	0.505	14.3	13.8	15.0	14.1	15.4	12.2
Splitting within the (Headdown ≤ 94.7 %) category
8	0.549	13.6	12.1	15.9	14.7	14.7	14.7
9	0.551	13.6	12.4	15.3	14.1	15.4	12.2
Splitting within the (Headdown ≥ 94.7 %) category
6	0.512	14.0	13.0	15.5	13.4	13.6	13.0
9	0.529	13.8	13.2	14.6	12.9	13.5	12.2
11	0.530	13.7	13.4	14.1	13.2	14.0	12.2