Washington, DC: American National Requirements Institute

To find the right place to cut a branch, search for the department collar that grows from the stem tissue on the underside of the base of the branch. On the higher surface, there’s often a branch bark ridge that runs (kind of) parallel to the branch angle, along the stem of the tree. A correct pruning lower doesn’t harm both the department bark ridge or the department collar.

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Cost complexity pruning generates a sequence of trees T zero … T m \displaystyle T_0\dots T_m where T zero \displaystyle T_0 is the preliminary tree and T m \displaystyle T_m is the basis alone. At step i \displaystyle i , the tree is created by removing a subtree from tree i − 1 \displaystyle i-1 and replacing it with a leaf node with worth chosen as in the tree building algorithm. The subtree that’s eliminated is chosen as follows: