Remapping class numbers:
	0 To 1
	1 To 2
	2 To 3
Pruned decision tree written to csv/pittsburg-bridges-MATERIAL.csv.dt.
Unpruned decision tree written to csv/pittsburg-bridges-MATERIAL.csv.dt.unpruned.
fold 1: acc. = 71.43	#leaves = 3	max. depth = 2
fold 2: acc. = 61.90	#leaves = 8	max. depth = 5
fold 3: acc. = 80.95	#leaves = 8	max. depth = 4
fold 4: acc. = 85.71	#leaves = 12	max. depth = 6
fold 5: acc. = 95.45	#leaves = 9	max. depth = 5
accuracy = 79.25	#leaves = 8.00	max depth = 4.40
.07500000000000000000