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. = 83.33	#leaves = 5	max. depth = 3
fold 2: acc. = 44.44	#leaves = 13	max. depth = 6
fold 3: acc. = 66.67	#leaves = 15	max. depth = 7
fold 4: acc. = 66.67	#leaves = 18	max. depth = 9
fold 5: acc. = 45.00	#leaves = 15	max. depth = 7
accuracy = 60.87	#leaves = 13.20	max depth = 6.40