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 = 2	max. depth = 1
fold 2: acc. = 66.67	#leaves = 16	max. depth = 8
fold 3: acc. = 66.67	#leaves = 16	max. depth = 7
fold 4: acc. = 55.56	#leaves = 12	max. depth = 6
fold 5: acc. = 60.00	#leaves = 16	max. depth = 6
accuracy = 64.13	#leaves = 12.40	max depth = 5.60