Model Performance
#	Complexity	split	relative error	CV error	CV S.D.
1	0.532	0	1	1.032	0.168
2	0.113	1	0.468	0.572	0.108
3	0.02	2	0.355	0.529	0.081
4	0.01	3	0.334	0.53	0.082