Remapping class numbers:
	0 To 1
	1 To 2
	2 To 3
Pruned decision tree written to data/csv/pittsburg-bridges-SPAN.csv.dt.
Unpruned decision tree written to data/csv/pittsburg-bridges-SPAN.csv.dt.unpruned.
fold 1: acc. = 72.22	#leaves = 4	max. depth = 2
fold 2: acc. = 55.56	#leaves = 18	max. depth = 9
fold 3: acc. = 61.11	#leaves = 19	max. depth = 8
fold 4: acc. = 38.89	#leaves = 15	max. depth = 7
fold 5: acc. = 50.00	#leaves = 17	max. depth = 8
accuracy = 55.43	#leaves = 14.60	max depth = 6.80