Model Performance
#	Complexity	split	relative error	CV error	CV S.D.
1	0.361	0	1	1.078	0.343
2	0.177	1	0.639	0.966	0.325
3	0.015	2	0.462	0.807	0.223
4	0.01	3	0.447	0.779	0.223