cost_complexity
cost_complexity(tree)
| tree | a tree. A data frame returned by the function |
|---|
a list containing the elements: cp: a data frame that summarizes the complexity as explained in the example in Breiman (chap 10, 1984). (k=number of iterations, (t_prunek=the k-th pruned node. All the subtree stremming from this node is deleted, N_Ttk= the number of leaves in the k-th pruned tree, R_Ttk=error for the pruned tree at the k-th step). summary: data frame indicating information about nodes in the maximal tree.