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. = 66.67	#leaves = 2	max. depth = 1
fold 2: acc. = 55.56	#leaves = 14	max. depth = 7
fold 3: acc. = 61.11	#leaves = 16	max. depth = 7
fold 4: acc. = 77.78	#leaves = 11	max. depth = 7
fold 5: acc. = 65.00	#leaves = 14	max. depth = 8
accuracy = 65.22	#leaves = 11.40	max depth = 6.00